NTRAC Final Study - Nebraska Department of Roads - State of ...

CHAPTER 8 – FINANCIAL AND ECONOMIC EVALUATION
Combination Trucks 10.87 3.70 0.98 49.34 16.78 4.44
All Vehicles 4.40 1.50 0.40 19.72 6.71 1.78
Source: Federal Highway Administration, 1997 Federal Highway Cost Allocation Study.
The costs shown in Table 8-13 are additive to normal travel time and vehicle operating costs.
Congestion costs are external to the trip maker in the sense that they represent the delay cost
imposed on other motorists by the additional trip.
The relevant congestion costs for this analysis are the ones shown for automobiles and buses.
Congestion cost savings result from diverting drivers to buses, thus removing cars from the
highways. However, these savings must be matched against whatever congestion that results
from more buses on the highways now carrying the former drivers to produce a net savings.
Using the factors, a weighed average congestion cost per transit corridor and per vehicle type can
be computed, as shown in Table 8-14. The table indicates both the relevant congestion costs per
vehicle type (middle range costs for cars and buses) from Table 8-13 and the approximate
proportion of rural and urban highway miles of total route miles in the three transit corridors.
Table 8-14: Congestion Costs for Cars and Buses in the Three Nebraska Transit Corridors
Corridor Vehicle
Type
Highway
Type
Percent of
Route
Congestion
Cost in
Cents per
VMT
Weighted
Cost in
Cents per
VMT
Fremont-Omaha Car Rural 78% 1.28 1.00
Urban 22% 6.21 1.37
2.37
Bus Rural 78% 2.37 1.85
Urban 22% 12.78 2.81
4.66
Blair-Omaha Car Rural 58% 1.28 0.74
Urban 42% 6.21 2.61
3.35
Bus Rural 58% 2.37 1.37
Urban 42% 12.78 5.37
6.74
Lincoln-Omaha Car Rural 75% 1.28 0.96
Urban 25% 6.21 1.55
2.51
Bus Rural 75% 2.37 1.78
Urban 25% 12.78 3.20
4.98
Source: Wilbur Smith Associates
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NEBRASKA TRANSIT CORRIDORS STUDY
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WILBUR SMITH ASSOCIATES