Fuel
consumption and exhaust emissions are directly related to traffic
movement and vehicle speed and acceleration/deceleration. Vehicular
traffic in the Palestinian areas consumes approximately 60 percent of
the total fuel consumption. Therefore, the continuous growth in the
number of vehicles in general and passenger cars in particular will
increase fuel consumption and emissions in the area. The objectives of
this study are to evaluate the impact of traffic signals and their
improvements on traffic movement and delay and to link traffic measures
of effectiveness (MOE) with fuel consumption and air pollution in Nablus
City downtown area. CORSIM simulation model was used as a tool to
estimate traffic and environmental MOE. Studies showed that traffic
signal improvements in urban areas could lead to a reduction in fuel
consumption and exhaust emissions in percentages ranging from 25 to 65
percent. In this study, traffic signals were improved at study
intersections and corridors in downtown Nablus City using optimum cycle
length, signal timing, and progression. These improvements resulted in
reducing average delays by 3 to 57 percent, fuel consumption by 2 to 25
percent, and carbon oxides air pollution by 2 to 10 percent. The study
recommends improving traffic circulation and reducing fuel consumption
and emissions using traffic signal improvement plans at the network
level in downtown Nablus City. The implementation of traffic systems
management, which includes low cost and quick to implement plans, is
also recommended to improve traffic and environmental conditions in
Palestinian cities.
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