Civil Engineering Reference
In-Depth Information
Table 11.1 Accessible area
within 30 min trip time, by
travel mode
Mode
Area accessible in 30 min trip
time (square miles)
1. Car
Urban
201
Suburban
572
2. Bicycle
Urban
50
Suburban
113
3. Bus
Urban
7
Suburban
6
4. Walk
Urban
7
Suburban
7
Fig. 11.3 Trip distance
isochrones by various modes
for a 30-min trip
generally determined by the type of routes and by the amount of excess time
(walking, waiting, and connecting) required by a particular mode. Thus arterials/
freeways and rapid transit routes entail the shorter travel time, while arterials and
surface transit require the longest door-to-door travel times.
