Transit vehicles make in-lane stops using boarding bulbs, boarding islands, median platforms, or curbside sidewalk stops.
In-lane stops limit the curb length needed for efficient transit stops, preserving space for other curbside uses.
Boarding bulbs and islands minimize interruption of the sidewalk, providing comfortable space for waiting riders, and shortening crossing distances.
Stop platforms may serve a streetscape function as well, creating space for planters, bioswales, furniture, or bike parking.
Ensure platform length provides adequate space for waiting passengers at high-volume stops and routes.
Bulb and boarding island widths are usually constrained by available right-of-way to 6–10 feet, depending upon configuration, so additional rider capacity is dispersed along the bulb length. All-door boarding has also demonstrated effectiveness in distributing riders along platforms.
Kay Fitzpatrick, et al. Evaluation of Bus Bulbs. TCRP Report 65, Transportation Research Board (2001).
At low transit volumes, in-lane stops have little effect on street operations but reduce transit delay.
At high transit volumes, in-lane stops improve transit speed and provide room for more buses per block.
Refer to the above table for preferred platform lengths with bus stops. Rail platform length will vary based on vehicle length, but should extend from the front door through the rear door.
Locate platform with at least 10 feet of clear distance from crosswalk or curb return. Measure to transit stop pole at near-side, or rear of transit vehicle at far-side.
While 5 feet is the minimum curb length for a receiving facility at each boarding door (ADA Std. §810.2.2), design platforms to be continuous through all doors, and consider additional elements to improve passenger comfort (see Station & Stop Elements).
Provide 5–10 feet of distance between each additional transit vehicle expected to be dwelling at the platform consistently throughout the day.
5–10 feet between each queuing vehicle.
Boyle, Daniel K. Better On-Street Bus Stops. TCRP Synthesis 117. Transportation Research Board, Washington, DC: 2015.
Design boarding bulbs and islands to accommodate proper drainage and sweeping; tight radii may require maintenance agreements to ensure bulbs are properly cleaned and maintained.