Civil Engineering Reference
In-Depth Information
Positive Consequences
: The capacity increase will increases personal mobility
and accessibility as more travelers are able to travel to destinations which best meet
their needs to maximize their wellbeing. The added capacity furthers the growth in
economic development and land values in the corridor
—
bringing signi
cant social
and economic bene
ts by accommodating more activity. However, the rate of
congestion growth on other routes is likely to decrease because they will attract less
development growth and generated fewer trips.
Negative Consequences
: The increase in traf
c volume could increase air and
noise pollution along the improved roadway. Other areas in the region become less
competitive in attracting growth
—
as their accessibility relative to that provided by
the improved corridor declines.
P
1,1
= Future Year User Cost with Expanded Capacity (S
1
) and Future Year Demand (D
1
)
P
0,2
= Future Year User Cost with Existing Capacity (S
0
) and Future Year Traffic Demand (D
2
)
V
0,2
= Future Year Traffic Volume for Existing Capacity (S
0
) and Future Year Traffic Demand (D
2
)
V
1,1
= Future Year Traffic Volume with Expanded Capacity (S
1
) and Future Year Traffic Demand
(D
1
)
Fig. 17.17
Comparison of future year generalized travel cost and traffic volume with and without
expanded road capacity
