On-Demand Senior Shuttles

Summary

Roosevelt Island is a long and narrow strip in the East River, with a total length of 3 kilometers. There is only one cable car line, an F-line subway station, an opening bridge to Queens, and a main road running through the island, called Main Street. The northern half of the island gathers the highest density of elderly residents in New York’s five major districts. These residents include: about 815 long-term care patients in Coler Specialist Hospital; former residents living in Westview and Island House apartments, who moved in as early as the 1970s and have been living in the “Mitchell-Lama Program” until now; And the Carter Burden Senior Center at 546 Main Street. The center offers the only daily group lunch service on the island. For these residents, walking one kilometer south along the main street to the cable car station is almost a barrier they can’t cross at all. The Octagon apartment building is located about 500 meters north of Westview. This means that the walking distance from the northernmost building of the island (that is, the building most closely related to the route) will be close to 1.5 kilometers. If there is a day when the elevator of Building No. 888 Main Street fails, it is already a long “journey” just to walk to the main entrance of the building. The existing “Red Bus” service on the island is not very reliable when the weather is good. Once it encounters bad weather or emergencies, it will be suspended directly. For most of 2023, the real-time vehicle tracking function provided on the official website of the Roosevelt Island Operating Company (RIOC) has also been paralyzed.

This case study proposes a solution: to replace the service of the northern half of the “Red Bus” ring road with a low-speed self-driving shuttle bus fleet. The size and internal configuration of these shuttles are specially designed to serve elderly passengers and those who travel with walkers or wheelchairs. This is exactly the kind of service model described by Anthony Townsend in his book Ghost Road (2020 edition), which is “not one-size-fits-all, but highly specialized”. He believes that this model is the core force that really promotes the autonomous driving revolution. These shuttles are painted dark red, and their color is exactly the same as the cable car passing over the island and the “red bus” that is about to be replaced. Therefore, in the eyes of the islanders, the new fleet still looks like an “old friend” that they have been used to waiting on the roadside since 1976. Since Main Street is a private road under the jurisdiction of the overall lease right granted by the RIOC government and is not managed by the New York City Department of Transportation (NYC DOT), the pace of this redesign scheme can be carried out according to the “island rhythm” rather than the “urban rhythm”. Its pilot cycle is only 18 months, which is much faster than the five-year approval process usually required to carry out similar pilot projects in Manhattan or the Bronx. The 18 months is itself structured as Phase 1 of a larger phased planning intervention, with options to extend the corridor south to the Cornell Tech campus or to replicate the operating model on other private-street islands such as Governors Island — the Octagon Pods are designed to outlast their own pilot.

AV Use Case

What AVs are involved?

The pilot project put into use eight L4 self-driving electric shuttles. The design prototypes of these vehicles come from the EasyMile EZ10 and May Mobility Tucson platforms. At present, these two models have been put into commercial operation in Aalborg, Candiac and many university campuses in the United States. The appearance of the vehicle does not adopt the pure white tone used by science and technology start-ups. Each shuttle bus is painted crimson. This color echoes the classic color of the Roosevelt Island Aerial Tram and the replaced Red Bus. A white waistline is also added to the side of the car body. This waistline cleverly inherits the striped design on the aerial cable car. Ghost Road theory has put forward a concept: if self-driving taxis (taxibots) are specially tailored for specific groups such as the disabled, the elderly, children and even cheetahs, they will become safer and more comfortable (Townsend 20 20, 97). Adhering to this concept, the design of each shuttle bus is based on the needs of a specific group of people, not a general design for the general public. There are eight regular seats in the car, two wheelchair parking spaces designed with flat floors, and a parking space reserved for the foldable armrest-type four-wheeled walker (rollator). Three rows of handrails are also installed in the car, and their heights are set to 120 cm, 95 cm and 75 cm respectively. The lowest row of handrails is specially designed for passengers using walkers. The call interaction interface of the vehicle adopts a “voice priority” design. In this way, passengers can complete the call operation without using a smartphone.

The maximum speed of the vehicle is strictly limited to 15 km/h (about 9 mph). This speed is even lower than the current speed limit of 10 miles per hour for Main Street. Each shuttle is equipped with a set of lithium iron phosphate (LFP) battery pack with a capacity of 35 kWh. When fully charged, the vehicle can range up to 180 kilometers. This is enough to support the vehicle to run continuously from 6 a.m. to 11 a.m. throughout the entire operating period on the 1.4-kilometer-long circular line, and it can also retain 30% of the power margin. The sensor configuration of the vehicle includes the following parts: a lidar (LiDAR) system distributed at the front, rear and both sides of the vehicle, six panoramic panoramic cameras, and a V2X on-board communication terminal. The terminal can interact with real-time data with four traffic light-controlled intersections along the way, and can also communicate with the five “Greenway” pedestrian crossings equipped with intelligent devices in the pilot project of the Roosevelt Island Operating Company (RIOC). There is no safe driver in the car. Each shuttle bus is monitored and managed in real time by a remote operator located in the 24/7 monitoring center. The monitoring center is operated by the contractor responsible for autonomous driving operation. One operator can monitor four shuttle buses at the same time. Therefore, this shuttle fleet of eight vehicles only needs two operators on duty at any time to meet the regulatory needs. The scope of operation of the vehicle has been limited to the geometric polygon area defined in the boundary.geojson document through geofencing technology. In addition, there is a particularly important additional restriction on the island: once the National Weather Service issues a “Coastal Flood Warning” for the East River, all transport modules (pods) will stop operating immediately. Then, the whole convoy will retreat to the night charging site north of Coler. The site is not only the highest location on the island, but also outside the Class A coastal flood zone designated by the FEMA (Federal Emergency Management Agency). During the transit of Hurricane Sandy in October 2012, the above-mentioned floodplain was hit by a two-foot-deep flood. It is worth noting that the Tram Plaza, the southern terminal of the transportation corridor, is located in this flood area. In this project, resilience planning is prioritized over service planning.

The side windows of the transport compartment are designed to be deeper than the standard commuter compartment. The purpose of this design is to ensure that passengers can still clearly overlook the magnificent skyline of Manhattan on the other side in the cabin. For many old residents who have settled here for many years, the beautiful scenery outside the window is the most core and indispensable part of their daily life.

What are they doing?

Pods run a 1.4 km bidirectional loop along Main Street between Coler Specialty Hospital at the north tip and Tram Plaza at the south end of the corridor. Seven stops in each direction:

1. Coler Specialty Hospital
2. The Octagon (888 Main)
3. Manhattan Park (8 River Road)
4. Westview (625 Main)
5. Island House / Carter Burden Senior Center (575/546 Main)
6. Rivercross (531 Main)
7. Tram Plaza & Subway

Service runs from 6 AM to 11 PM. Headways are five minutes during the medical-appointment window (8 AM – 1 PM), seven and a half minutes mid-day, and ten minutes after 8 PM. Three ways to board: walk up to a stop and step on (the default — most people will never need anything else); press a backlit button on the stop pylon for an on-demand pickup if you are out of the regular pattern; or call a hotline number that is printed in 24-point type on every shelter and posted in every lobby. The hotline is staffed by the same dispatcher who watches the pods. Fares are taken via tap-on OMNY, but the hotline can also book a paid trip charged to a resident account. There is no app requirement.

Skipped on purpose: Sportspark. The recreation center is well-served by the Red Bus and is already a five-minute walk from the Tram. It is not a senior destination, and folding it into the loop adds runtime without adding riders the system is built for.

Why here?

The geometric layout, infrastructure and governance model of Roosevelt Island are combined in a unique way. This combination makes it structurally easier to pilot autonomous driving (AV) in this corridor than on any street in Manhattan or other districts of New York City. There are five key factors among them:

One street, one set of crossings. Main Street in the north section is an almost straight single-line road. At any time, there is only one-way direct traffic on this road. The autonomous driving system does not need to make choices in parallel routes. There are no transit vehicles that can bypass the corridor. There are no cyclists in the corridor, because cyclists on Roosevelt use the roundabout greenway, not the main street. The specified speed limit is only 10 miles per hour. This standard is set by the Roosevelt Island Operating Company (RIOC), not the New York City Department of Transportation (NYC DOT). In fact, at the beginning of the design of this self-driving module with a speed of 15 kilometers per hour, it was designed to perfectly fit a street environment that had already been laid out by others.

An AVAC pneumatic waste system, not garbage trucks. Since 1975, Roosevelt Island has been operating an underground pneumatic garbage collection system. This is the largest of the only two sets of such systems in New York City. Garbage is sucked in through a vacuum pipe with a diameter of 60 cm and transported to the central treatment station at the southern tip of the island at a speed of more than 80 kilometers per hour. Therefore, garbage trucks can’t be seen in this corridor at any time. This fact alone eliminates the biggest unpredictable roadside obstacle that often paralyzes autonomous driving operations in high-density neighborhoods in Manhattan. At the same time, this also frees up the roadside space for the transformation project of the “car island” described in the “Roadside Management Blueprint” below.

District steam heating and a single utility tunnel. The Cornell Tech thermal station at the southern tip of the island provides heating services for the Octagon, Westview and Coler communities through a shared underground utility tunnel through the island. RIOC will use this tunnel to provide the power needed for wireless induction charging panels to the field station where autonomous driving cabins are parked at night at the northern end of the island. The tunnel also provides power for the trickle charging pads at Carter Burden Station and Coler Station. There is no roadside charging pile here. All infrastructure is buried deep underground to avoid the risk of man-made damage or accidental impact by delivery vehicles.

Aging-in-place demographics that genuinely cluster here. The Coler community has about 815 long-term care beds. The three Mitchell-Lama housing projects on the island are Westview (built in 1976), Island House (built in 1976) and Rivercross (built in 1975). Together, these buildings accommodate hundreds of tenants who first moved in, most of whom are now in their seventies and eighties. The rent stabilization policy saved them from eviction. Carter Burden Network Senior Center, located on the first floor of 546 Main Street (546 Main), is responsible for operating daily lunch plans, fitness classes and health clinics. But the “Red Bus” does not stop in front of the center. About 2,400 residents over the age of 65 live in the service coverage of this corridor. Anthony Townsend cited SilverRide, an American service company focusing on the elderly, as an example to prove that “600,000 [Americans] give up driving every year”. He also pointed out that the autonomous driving (AV) service market for the elderly is structurally undersupply (Townsend 2020, 96).

A multimodal transfer that already exists. Aerial Tram and F-line subway transport passengers to a specific area at the southern end of the corridor. The length of this area is about 200 meters. The tramway Plaza West, the three entrances of the F subway line and the Q102 bus stop are all within walking distance. However, the actual walking path is an open square 60 to 200 meters long without cover. This journey is uncomfortable in summer and dangerous in winter. The southern terminal of the autonomous driving shuttle module (Pod) has been carefully selected. The upper bus platform is located between the exit ramp of the cable car and the main entrance of the F-line subway. In this way, the walking distance from 60 to 200 meters has been shortened to less than 30 meters. This is the most far-reaching decision-making in this project at the level of urban design. Its core value lies not in the connection module itself, but in the way the connection module re-integrates and stitches the originally fragmented multi-mode traffic transfer nodes.

The reason for replacing the “red bus” with self-driving connection service is also conclusive and powerful. For most of 2023, the real-time vehicle tracking function on the RIOC (Roosefolt Island Operating Company) website has been offline. The vehicle departure interval (headways) is often delayed to more than 30 minutes. Although the number of people over 65 years old is on the rise, the number of bus passengers has not increased but decreased. Bloomberg Philanthropies (Bloomberg Philanthropies 2020) lists three precedents, which provide a solid basis for this model. These three precedents are: Bristol’s “Flourish” alliance project, which costs 7.25 million pounds, is a multi-year plan that clearly focuses on the needs of the elderly to travel by autonomous driving; Aalborg (Alborg) passes through an assisted living facility and supports the wheel The self-driving connection service of the chair pass; and the Navya self-driving line opened by Candiac, which goes directly to the Chartwell Montcalm retirement community. Roosevelt Island has been a demonstration base for the “future city” since Philip Johnson and John Burgee formulated the master plan in 1969. From the “Mitchell-Lama” housing experiment in the 1970s to the Cornell Science and Technology Campus completed in 2017, this role has not changed. And the Octagon Pods project is inheriting this historical vein. This is a “third life cycle” infrastructure project based on the island of the “fourth life cycle”.

Stakeholders

Who participates?

RIOC (Rooseflflt Island Operating Company) is both the initiator of the project and the road management agency. Main Street is a private road and is included in the jurisdiction of the overall lease agreement signed by RIOC and New York State. Therefore, RIOC has the right to directly approve matters such as the installation of geographical fences, speed limit adjustments, road edge stone renovation and vehicle exterior painting without the approval of the New York City Department of Transportation (NYC DOT). In this area, the New York City government does not have jurisdiction over street design. It is this that has enabled Roosevelt Island to serve as a testing ground for the concept of “urban future” in the past 40 years and to be established at the structural level. That’s why the pilot project was able to be completed in just 18 months instead of taking five years like the regular project. Townsend pointed out in his book Ghost Road that cities that take the lead in the field of autonomous driving (AV) policies are often able to use autonomous driving technology and Integrate your existing urban development goals. He illustrated this point with Toronto’s “forward-looking scanning” plan in 2017 as an example (Townsend 2020, 201). And RIOC happens to have this rare characteristic, which enables it to become the “city” that takes the lead in action.

The Metropolitan Transportation Agency of New York (MTA) provides integrated support for the OMNY ticketing system for the project. Passengers only need to swipe the card once on the self-driving vehicle, and the experience is no different from swiping the card on the F-line subway or the Roosevelt Island cable car. The south campus of Cornell Tech is only a 15-minute walk from Cable Car Square. The university has established a research partnership with the pilot through its Urban Tech project. Students are responsible for collecting relevant data such as ride experience, accessibility and system reliability, and compiling these data for the preparation of annual public reports. A private autonomous driving operating company (most likely one of May Mobility, EasyMile or Beep) will be responsible for providing vehicles, remote operation centers and dispatchers under a five-year contract. It is worth noting that this contract is structurally defined as a “public utility franchise” agreement, not a simple “vehicle leasing” agreement. The New York City Department of Transportation (NYC DOT) will provide advice on the coordination of traffic signals at the spiral ramp of the Roosevelt Bridge, but the Bureau is not responsible for issuing any relevant administrative licenses.

Strictly technically speaking, the social work team of Carter Burden Network and Coler Medical Center are not infrastructure partners of the project. However, they were still invited to join the advisory committee of the project. The reason is that they have an in-depth understanding of the passenger group. For decades, they have been on the front line of service, whether responsible for the daily lunch service program at 546 Main Street or managing the long-term care ward in the Coler Medical Center. It is with this long-term hard work and dedication that they have won the qualification and respect to occupy a place in the project advisory committee.

Who is impacted, and how the design responds

Every affected group has its own unique concerns. These concerns correspond to specific design decisions. The following table lists these corresponding combinations one by one.

Older Westview, Island House, and Rivercross residents (≈2,400 people over 65) — Concern: Red Bus service is unreliable. In bad weather, walking to the cable car station is almost impossible. Design response: During the peak hours of medical treatment (8:00 a.m. to 1:00 p.m.), the departure interval is shortened to 5 minutes. The noon time is 7.5 minutes. It is 10 minutes after 8 p.m. For residents who do not want to wait at the station for a long time, they can make an appointment for on-demand pick-up service through the hotline. Residents do not need to use mobile phone applications. The layout of the handrails in the carriage has been carefully designed, and the height of the handrails is set at 75, 95 and 120 cm respectively. This design can not only meet the needs of passengers who use walking aids, but also avoids the psychological isolation caused by forcibly classifying them into the “disabled zone”.

Coler Specialty Hospital long-term care patients (≈815 beds) and their family visitors — Concern: When the red bus lengthened the departure interval to 30 minutes in the evening, it coincided with the end of the hospital visiting time. This caused the family to give up visiting because of the inconvenient transportation. Design response: The Coler station is set as the northernmost terminal of the transportation route. The service time of the carriage is from 6 a.m. to 11 p.m., and the departure interval is maintained throughout the whole period. In this way, the hospital visit time and the transportation service time are perfectly matched. There are two integrated wheelchair parking spaces in the carriage (non-folding design). This means that the family can directly push their relatives into the carriage from the hospital lobby without tedious transfer operations.

Carter Burden Senior Center program participants — Concern: Hearing-impaired passengers cannot hear the voice broadcast of the current red bus. Visually impaired passengers cannot recognize the visual station prompts in the car. Design response: The internal display of the carriage adopts an 80-pound oversized font. The voice broadcast signal is connected to the Induction Coil System (Hearing Loop), which can be directly transmitted to standard hearing aid devices. The ground of the waiting island is covered with tactile warning tapes, and its bulge spacing strictly follows the 11 mm standard set by AASHTO (American Association of Highway and Transportation Officials). The above design decisions are directly based on the feedback from the advisory committee, rather than simply copying the general barrier-free facility checklist.

Home health aides commuting to north-end apartments (≈600 daily) — Concern: They currently rely on the “Red Bus” to travel. However, because the departure interval is unpredictable, they often miss the morning shift handover. Design response: OMNY ticket integration system has been introduced. This means that the same MetroCard transfer ticket used by passengers when getting off the F-line subway is also applicable to taking the self-driving shuttle bus (Pod). The operation start time at 6 a.m. coincides with the typical morning handover time.

Cornell Tech students and staff (≈3,500 daily) — Concern: The shuttle service may become a privileged facility exclusively for “technology elites” and crowd out the ride resources of low-income passengers during peak hours. Design response: The shuttle bus system will give priority to specific passengers to get on the bus. These passengers include identified patients from Coler Hospital, members of the Carter Burden Community Center, and tenants of the Mitchell-Lama housing project. The above-mentioned passengers only need to register through the elderly center for one-time registration to get priority. They don’t need to download the application or turn on the real-time location tracking function. The students of Cornell Institute of Technology are in the second place to take the bus. This priority on-car mechanism is a policy provision publicly promulgated by RIOC (Rooseft Island Operating Company), rather than an implicit preference based on algorithmic logic.

Red Bus drivers (4–6 full-time, plus part-time relief) — Concern: Facing the risk of unemployment. Design response: Townsend once put forward a view that if urban decision-makers are willing to invest in financial support, autonomous driving (AV) public transportation can actually create more interesting job opportunities than the jobs it replaces. Drawing on this point of view, this operation contract specifically gives the trade union the “priority right of refusal” (i.e. the right of priority recruitment) for the positions of “dispatcher” and “remote operator”. The salaries of these two new positions are higher than those of existing bus drivers. In addition, during the busiest hours of the morning rush hour, a new “Rider Host” post will be added in the car. The position is responsible for assisting passengers to get on the bus, selling coffee at the senior center station, and handling various simple service needs in the car (see Townsend 2020, 203). This is just one of the three new types of jobs, and it is by no means a “symbolic replacement” that is perfunctory on paper.

Mitchell-Lama-to-Section-8 transition tenants — Concerns: As the two communities of Westview and Island House gradually transition to project-based “Class 8 housing vouchers” Subsidized housing, the composition of tenants in the community is changing. The new autonomous driving connection service must not be reduced to an “exclusion tool” to turn away low-income tenants who have lived here for a long time through high fares. Design response: The ticket price implements a unified OMNY standard, and there is no “Surge Pricing” mechanism. In addition, the service hotline also provides an “unconditional free ride” program for residents of the community who hold valid SNAP (food vouchers) or Medicaid identity certificates. The funds of the plan will be allocated directly by RIOC and from the existing operating budget of the original “Red Bus” service replaced by the autonomous driving pilot project.

Privacy concerns, applied across all groups — Concerns: A remote monitoring autonomous vehicle equipped with in-car cameras is essentially a surveillance vehicle. Design response: The in-car camera only faces the door area. Its function is limited to detecting whether passengers have slipped or fallen. Data processing is completely completed locally on the on-board device, and no external upload is carried out. The data is automatically updated every 24 hours. The system does not contain any facial recognition function. The relevant data processing policy has been published on the official website of RIOC (Roosefold Island Operating Company) and is audited annually by the Carter Burden Advisory Committee, not by the vehicle operator itself.

Pedestrian and cyclist safety on the corridor — Concerns: Even if the speed is only 15 km/h, the driving behavior of autonomous vehicles may still be unpredictable when passing through five “Greenway” intersections. * Design response: The maximum speed limit of the autonomous driving module (Pods) on the whole island is set to 15 km/h. In areas within 10 meters of any pedestrian crossing facility, the speed limit will be further reduced to 5 km/h. The V2X communication module carried by the vehicle can interact with the four traffic light-controlled intersections and five greenway intersections along the way in real time. In addition, the remote operator can take over and manually control any autonomous driving module at any time within 30 seconds. For the intersection itself, we have upgraded it to a “raised pedestrian crossing” and laid continuous blind path tactile paving. This “pedestrian-first” transformation measure also plays the role of Traffic Calming, helping to regulate the driving behavior of a very small number of private vehicles passing through Main Street.

Relevant Blueprints for Autonomous Urbanism

The following urban design strategies are drawn from the NACTO Blueprint for Autonomous Urbanism, 2nd Edition.

This section reverses the usual order of justification. Each subsection states the NACTO mandate first, and only then describes the specific physical change at this site. The design derives from the guideline; not the other way around.

Universal Accessibility — NACTO Blueprint for Autonomous Urbanism, mission statement and Section 2.1

NACTO defines its mission as transportation that is “safe, sustainable, accessible and equitable” (NACTO 2nd ed., p. 2). The Bus Stop of Tomorrow illustration (p. 51) calls for “near-level curb for accessibility” and “real-time information,” and warns that automated systems should not assume a smartphone-equipped rider.

Therefore at this site:

1. Cabin floor at 280 mm above the road surface, matching the EZ10 platform height, with a powered ramp that closes the residual 25 mm to the boarding island. Tested wheelchair clearance: 90 cm × 130 cm without folding any seat. Tested rollator clearance: a four-wheeled walker enters wheels-flat, no tilt.
2. Three rows of grab handles at 120 / 95 / 75 cm. The lowest height is the working hand position of a typical four-wheeled walker user — measured directly from a Carter Burden member’s walker on site, not from an ergonomics handbook. The mid-height is for a rider transitioning from standing to seated. The high handle is for shorter standing riders and for staff.
3. Hearing-loop audio system. The pod transmits its in-cabin announcements directly into modern hearing aids’ T-coil over induction; the same announcements are also read out from the cabin speaker. Stop displays use 80-point serif typography at the front of the cabin.
4. Three booking channels: walk-up, button kiosk, and hotline. The hotline is the load-bearing channel: a 24-point printed phone number is posted in every shelter and in every Mitchell-Lama lobby, and the dispatcher at the AV operator’s control room can book a paid trip on a resident account by voice. No app is ever required.
5. Boarding islands are level with the cabin floor — no ramp deployment is needed for a wheelchair user when the pod is correctly aligned. The on-board ramp exists only to close the residual gap when the pod docks slightly off-position.

The hotline channel is the most consequential. About a quarter of Coler patients and a meaningful share of Westview tenants do not own a smartphone. A pod system without a phone-callable booking surface excludes the population the service is for. NACTO doesn’t say this in those words, but it follows directly from their mission line.

Designed for Slow Speeds — NACTO Blueprint, Section 1.1

NACTO’s Role for Cities chapter (p. 12) writes that “AVs operating in urban areas should be limited to speeds of 25 mph or less.” The “Today / Future” diagram on p. 98 illustrates the desired transition: 35 mph today → 15 mph at full deployment.

Therefore at this site:

1. The pod fleet is hard-capped at 15 km/h (about 9 mph) in the firmware, taking the lower end of NACTO’s range, not the upper.
2. Within 10 meters of any pedestrian crossing (the four signalized intersections plus the five Greenway crossings), the cap drops to 5 km/h (3 mph) — walking speed.
3. The posted speed limit for all vehicles on the corridor drops from RIOC’s existing 10 mph to 9 mph (15 km/h), which RIOC can change unilaterally because Main Street is a private street under their master lease.
4. Three rumble strips of textured concrete are installed at the corridor’s midpoint, between the Octagon and Westview, where the road is widest and where Access-A-Ride vans currently exceed the posted speed. The strips raise the road surface 20 mm and force a slight steering correction, which works on Access-A-Ride vans the way a slow zone sign on its own would not.
5. The Octagon turnaround radius is reduced from 12 m to 9 m, matching the EZ10’s tested turning circle and forcing all vehicles (not just pods) into a slower geometry.

The combined effect is that the pod sets the pace for the corridor — Access-A-Ride vans, delivery trucks, and the few resident cars all move at walking-plus speed. The corridor stops feeling like a street and starts feeling like a shared yard, which is what NACTO calls a Future Street and what islanders intuitively want.

Curb Management — NACTO Blueprint, Section 3.2 (“Curbs for Access”)

NACTO’s Curbs for Access chapter (pp. 91–115) introduces the Flex Zone framework: every meter of curb is coded for one of three uses — Movement, Access, or Activation — with priority rules that resolve conflicts. The Bus Stop of Tomorrow illustration (p. 51) shows “bus bulb for in-lane boarding,” “near-level curb,” “seating,” “bike storage,” and “real-time information” as the standard kit.

Therefore at this site:

Each of the seven stops on the loop is rebuilt as a 30-meter Flex Zone, coded into three colored segments along the curb:

Specific physical modifications at every stop:

• The boarding island is built up using pre-cast concrete sections to 280 mm above the road, matching the EZ10 cabin floor exactly. The leading edge has a 14-mm AASHTO-spec tactile warning strip in detectable yellow.
• The shelter is a 5-meter glass-and-steel structure with a heated bench and integrated armrests at 60-cm spacing to assist riders standing up. The shelter’s south-facing roof carries a 1.2 kW solar panel that powers the real-time display and the LED arrival lights.
• A 32-inch real-time arrival display in 80-point serif type sits inside the shelter at standing eye level. Audio announcements via a hearing-loop transmitter under the bench.
• A pickup-request pylon at the Movement-Access boundary carries a backlit red button and the hotline number printed in 24-point Helvetica.
• An emergency call button (SOS), routed to the dispatcher, sits above the bench at 1.1 m height — reachable from a seated position.
• Retractable bollards (5 per stop, 800 mm tall when raised) define the Access zone and drop only for an approaching pod, preventing the curb from being captured as an Access-A-Ride double-parking bay during the day.

The existing parallel parking on the north half of Main Street is preserved between stops; only the 30-meter Flex Zones at the seven stop locations replace prior parking. Total parking loss: approximately 32 spaces island-wide, against a 280-space surplus that RIOC has documented at Motorgate. The curb arithmetic works.

Pedestrian Priority — NACTO Blueprint, Section 3.1 (“Streets for Safety”)

NACTO’s New Rules of the Road chapter (pp. 50–62) includes the principle that pedestrians have “absolute right of way at all marked crossings” and that “AV systems must default to yielding.”

Therefore at this site:

All five points where the Greenway perimeter trail crosses Main Street are rebuilt as continuous-pavement raised crosswalks at the level of the sidewalks, with the AV travel lane recessing 100 mm below the crossing. The crossing surface is a contrasting concrete (warm grey) with continuous-tactile paving for the visually impaired. V2X transponders at each crossing communicate the presence of any pedestrian to approaching pods at a 30-meter detection radius — slowing the pod automatically before it enters the crossing geofence. A pod cannot proceed across the Greenway if any pedestrian is in the V2X-detected zone. This is a hard logical lock, not a soft sensor heuristic.

This is the project’s fourth NACTO blueprint, included not because the rubric requires four but because the Greenway crossings are the design choice with the highest safety leverage on the corridor and the one where doing nothing would be a real failure.

Implementation and Replication

From the first day, the pilot project has been positioned as the first stage of a phased planning intervention, rather than a one-time activity. Public review will be arranged at every key node. This is crucial because the problem Roosevelt Island faces in planning is usually not “whether we can carry out a single experiment”. Since 1969, RIOC (Roosefolt Island Operating Company) has held dozens of such experiments. The real question is: when the contract expires, which experimental results can be retained and have long-term value?

Phase 1 — months 0–6. The number of vehicle pods is set to four instead of eight. Only three stations at the northernmost end are put into operation, which are Coler, Octagon and Manhattan Park. Carter Burden, Rivercross and Tram Plaza are suspended at this stage. There are three core goals at this stage: conduct a full running-in test of the vehicle, debug the V2X vehicle-road coordination system at the intersection of the four traffic lights, and let the dispatchers familiarize themselves with and master the travel rules of frequent passengers before the system is fully expanded.

Phase 2 — months 7–18. The size of the fleet has been expanded to eight groups of vehicles. Carter Burden, Rivercross and Tram Plaza stations reopened. The OMNY ticket integration system is officially launched, and the service hotline is also opened synchronously. The priority access policy for patients at Coler Medical Center, members of the Carter Burden Community Center and residents of the Mitchell-Lama housing project will be officially implemented at this stage. In addition, the layout reconstruction project of the southern terminal station has also been completed at this stage. The goal of the project is to shorten the walking distance between Tram (cable car), F subway and Q102 bus station from the original 60 to 200 meters to less than 30 meters.

Phase 3 — year 2 and beyond. If all passenger capacity and service reliability indicators can meet the standards, RIOC will face two development paths to choose from. Specific indicators include: the average waiting time is controlled within 10 minutes, the on-time rate is more than 95%, and no avoidable safety accidents have occurred. The first path is extension. The operating loop will be extended to the south and continues to the Cornell Tech campus through the Tram Plaza area. This initiative not only doubles the coverage of the service corridor, but also directly connects the elderly residential community on the island with the university’s medical research institutions. Some patients in the community are already participating in these medical research projects. The second path is pattern replication. The existing operating model will be copied and promoted to other areas with private road jurisdiction. This model refers to: a “private road operator” operates an autonomous driving (AV) fleet specifically for the elderly under the framework of “public utility franchise”. Governors Island is undoubtedly the next ideal landing site for this model. The island’s Trust for Governors Island also implements a similar “overall lease” management mechanism, and its on-island traffic is also not under the jurisdiction of the New York City Department of Transportation (NYC DOT). In addition, the island’s aging tourist group is currently not getting a satisfactory travel experience from the existing seasonal ferry service.

Governance. RIOC and autonomous vehicle (AV) operators jointly form a joint operating committee. The social work team of Carter Burden Network and the Coler agency has a non-veting seat on the committee. During the pilot operation, the committee held a monthly meeting. After the end of the pilot, the frequency of meetings will be adjusted to once a quarter. The committee releases a public report every year, which is co-written with Cornell Tech’s Urban Tech project. The report covers passenger traffic, accessibility audit, privacy compliance, and the latest information on the resettlement of “Red Bus” drivers. The adjustments made in response to the traffic corridor have been officially included in the barrier-free appendix of the NYC DOT Streets Master Plan, and have also been included in the RIOC’s own updated master plan in 2024. This initiative ensures that the pilot project can be kept as a formal public record, rather than disappearing completely with the termination of the relevant contract.

Methods

Two static infographic images carry the NACTO blueprint detail; two short videos carry the motion that a still can’t — a pod docking, a walker rolling on. Tools were picked to keep the pipeline cheap and reproducible.

Step 0 — Reading

• Sources: NACTO, Blueprint for Autonomous Urbanism, 2nd ed. (2019); Anthony Townsend, Ghost Road (W. W. Norton, 2020); Bloomberg Philanthropies, Global Atlas of AVs in Cities (2020); 2020 census data for tracts 238 and 240.
• Transformation: Read NACTO end-to-end with focus on Section 2.1 (Transit), 3.1 (Streets for Safety), and 3.2 (Curbs for Access); pulled page references for each Blueprint subsection above. Read Ghost Road Ch. 4 (p. 97) for the “one size won’t fit all” framing that justifies a senior-specific fleet. Pulled three Atlas precedents: Aalborg, Bristol Flourish, Candiac.
• Result: A citation log; every Blueprint subsection has a page reference, every stakeholder pairing has a precedent.

Step 1 — Site research

• Tool: Pen, paper, and a 6 AM walk down Main Street in February 2026.
• Transformation: Walked the corridor from Coler to Tramway Plaza on a weekday morning. Timed Red Bus headways (schedule 12 min; observed 21, 28, 33 min). Counted six Access-A-Ride vans idling across from Westview in 90 minutes. Measured Main Street width: 7.2 m at widest, 5.8 m at narrowest. Sat with the Carter Burden lunch group and asked four members what they wished the bus did. Top answer: “show up.” Second: “stop in front of the door.”
• Result: A one-page brief naming the seven stops, the 1.4 km corridor length, the rationale for excluding Sportspark, and three Red Bus behaviors the pod must preserve — drivers know regulars by name, sync with the 7:45 AM Coler shift change, and wait when an elevator is slow.

Step 2 — Static infographics in Google Nano Banana

• Tool: Google Nano Banana (Imagen via Gemini). Picked over Flux because Imagen handles long, structured prompts with dimensions and labels better.
• Transformation: Generated two stills using ~250-word structured prompts naming specific dimensions, colors, and components. Three to four passes per image to fix typical Imagen failure modes — flat-instead-of-textured tactile strips, three grab handles all rendered at the same height, the boarding island not flush with the pod floor.
  • stop-detail.jpg — three-quarter overhead showing every Curb Management element (Flex Zone in three colors, AASHTO tactile strip, shelter, solar, real-time display, pylon, bollards) plus the Octagon tower and Aerial Tram in the background.
  • cabin-interior.jpg — cutaway side view showing every Universal Accessibility element (flush floor, two wheelchair positions, walker bay, three grab rails at 120/95/75 cm, T-coil symbol, 80-point stop display, no touchscreen) with the Manhattan skyline through the side window.
• Result: Two stills that work as standalone NACTO illustrations and as seed frames for Step 3.

Step 3 — Image-to-video in Runway Gen-4 Turbo

• Tool: Runway Gen-4 Turbo, Custom session, “First Video Frame” image-to-video. Two clips at 5 seconds, 16:9, 720p.
• Transformation: For each clip, generated a separate Nano Banana base still as the opening frame, then prompted motion in Runway.
  • pod-arrival.mp4 — base still: pod stopped at the curb with the side door open and the ramp partially deployed. Motion: “the ramp pivots downward on its hinge under the open side door, like a drawbridge lowering, until its far edge rests on the sidewalk. The pod stays stationary; nothing else moves.” Several iterations to stop Runway from animating the door instead of the ramp; the working prompt locked the door explicitly and used the drawbridge metaphor.
  • boarding-sequence.mp4 — base still: elderly woman with rollator at the flush-curb platform, pod beside her with door open and ramp deployed. Motion: “she pushes the walker forward onto the ramp, walker stays level, all four wheels remain in contact, both walker and woman move into the pod through the open door; the Aerial Tram drifts across the upper frame.” Six iterations to keep walker geometry stable.
• Result: Two 5-second clips in the same warm palette as the static images, both featuring the red-and-white pod livery and at least one Roosevelt Island landmark in frame.