Intersections are locations where vehicular conflicts
exist. Intersection design should provide operational quality and safety for all
types of vehicles and for pedestrians. The street capacity is not usually
controlled by the general segments but by the intersection capacity.
Improvements such as providing traffic control devices (e.g., yield and stop
signs or traffic signals) can provide significant capacity and safety
improvements. Providing the appropriate traffic control for the existing volumes
will maximize benefit.
Along with modern signaling system, safety and
regulatory aspects of roadway design elements near intersection also need to be
examined for ensuring smooth flow of traffic. The main attention may be given on
medians, road humps, road markings, traffic sign, roadside hazards, and
pedestrian crossing facilities.
The aim of the study is to design signal timing of
the selected intersection for improving its performance, for example, reducing
delay, orderly movement of traffic flow, etc. Besides designing of signal
timing, some problems associated with the selected intersection are also
identified. These problems mainly focus on safety issues related to pedestrians,
road sign, road marking, illegal parking etc. Finally, solutions have been
proposed from engineering point of view.
Intersection between Old Airport Road and Bijoy
Sarani Road has been chosen in this study. This road is very important from
national point of view since Prime ministerís office is situated near it.