Civil Engineering Reference
In-Depth Information
Fig. 11.6 Accessible areas for a 30 min automobile trip during congested and uncongested traffic
11.4 Barriers to Modal Accessibility
The previous examples assume that each travel mode was free of barriers to its use.
In reality, however, the choice of a travel mode is sometimes affected by the
presence of barriers to its use. Some of the most commonly found barriers to mode
access are listed below for the walking and cycling mode; public transportation
modes; and auto drivers.
11.4.1 Accessibility Barriers to Walking and Bicycle Use
Steep grades and steps
Risk exposure to vehicular traf
c
Long stretches of freeway that divide neighborhoods
Crossing wide streets with heavy traf
c
Discontinuous networks/cul de sacs
No sidewalks
Streets not conducive to bicycle lanes
Lack of traf
c control signals at crossings of busy streets
