Abstract:
Road Over Bridges (ROB or flyover as it is popularly called in India) are
considered as a solution to reduce the delay at an oversaturated at-grade signalized
intersection. However, this provision of flyover remains a short-term solution, as
it is seen that flyover also reaches to the same congestion level after a few years
due to increased personalized vehicular traffic. To analyze the effect of a flyover
over the years, vehicular delay, fuel consumption, and emission for the range of
traffic volume are estimated. One intersection, Bhikaji Cama Place intersection in
New Delhi, is considered as a case study. This is a four-legged signal-controlled
intersection. Three scenarios are considered. Scenario A is the existing condition of
flyover and signal phasing plan, Scenario B is with flyover and with proposed signal
phasing plan, and Scenario C is without the flyover and proposed signal phasing
plan. Scenario B includes comparison of alternate signal phasing plans to obtain the
best signal design for existing traffic to minimize the delay. Delay estimation, fuel
consumption, and emission estimation have been carried out by existing methods for
all the three scenarios.
