Three basic street environments are discussed in this guide: Neighborhood, Corridor, and Downtown transit streets. Just as each of these contexts has distinct design needs related to its role in the transportation network, each context presents unique challenges to designing for transit.
Infrastructure options for transit stops, lanes, and intersections are affected by the existing design of a street and the types of transit vehicles in use, but priorities in the allocation of space are often defined by factors beyond the transit service or vehicle itself—from the nature of local businesses to the length of blocks.
Techniques that keep local buses prompt on small neighborhood streets are insufficient for downtown streets with multiple types of service, heavy boardings and unpredictable traffic speeds. The mix of walking, bicycling, driving, parking, and staying activities inform design goals, as do the buildings, institutions, and businesses that form the urban character.
This approach to transit design emphasizes the experience of people using and accessing transit and public space, along with the value of time. It treats streets as linear public spaces that support transit by making it both reliable and attractive as a means of urban travel.