Civil Engineering Reference
In-Depth Information
Fig. 17.14
Total peak hour person volumes in the peak direction on 35 HOV facilities related to
bus vehicle volumes.
Source
Reference [
19
]
Peak-hour freeway congestion in the general purpose lanes
HOV time savings of at least 1.0 min per mile or 7.5 min per trip
Availability of park-and-ride facilities and HOV price discounts or free passage
on tolled facilities
Willingness to accept several years of initial operation at marginal utilization,
while usage develops, is critical and may be essential for HOV success.
Many HOV facilities
—
especially those oriented to the downtown business
districts
have relatively high bus volumes. This relationship is apparent from the
scatter diagram shown in Fig.
17.14
.
—
17.3.2 Truck-Only Lanes
When
first designed, many modern highways were expected to carry moderately
low ADT with a traf
c mix of up to 10 % trucks, for up to 30 years.
“
'
s VMT has more than
doubled (its original estimates), and trucks weighing more than 80,000 lb account
for 30
Today, more than 50 years later, the Interstate system
”
-
40 % of the daily VMT [
20
].
