Civil Engineering Reference
In-Depth Information
Fig. 6.1 Relationship between vehicle-miles traveled (VMT) and lane-miles for
interstate
highways in urban areas (1980
-
2000).
Source
Reference [
1
], Tables 1-6 and 1-33
Fig. 6.2 Relationship between vehicle-miles traveled (VMT) and lane-miles for other arterial
highways in urban areas (1980
2000).
Source
Reference [
1
], Tables 1-6 and 1-33
-
The roadway capacity of many suburban arterial roads built years ago in support
of emerging suburban land developments is no longer suf
cient to serve the traf
c
demand in many mature suburbs of today.
The chronic de
ciency of roadway capacity relative to increasing traf
c demand
—
has grown over
e.g.,
2007
-
2008). Highway capacity deficiency largely reflects a lack of available space
for highway expansion in built up areas where resistance to highway construction
time (except during periods of economic slowdown
