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Delay is defined as an extra time spent by drivers against their expectation.
Delay can have many forms depending on different locations.
A study made to provide information concerning the amount, cause, location,
duration and frequency of delay as well as travel time and similar value.
The time lost by traffic due to traffic friction and traffic control device is
called delay.
- Congestion delay- Congestion delay is the delay caused by the
constricting or slowing down effect of overloaded intersections, inadequate
carriageway widths, parked cars, crowded pavement and similar factor.
- Fixed Delay- The delay to which a vehicle is subjected regardless of the
amount of traffic volume and interference present.
- Operational Delay-The delay caused by interference from other component
of the traffic stream.
Examples include time lost while waiting for a gap in a conflicting traffic
stream, or resulting from congestion, parking maneuvers, pedestrians, and
turning movement.
- Stopped Delay- The time a vehicle is not moving.
- Travel Time Delay- The difference between the actual time required to
traverse a section of street or highway and the time corresponding to the
average speed of traffic under uncongested condition.
It includes acceleration and deceleration delay in addition to stopped delay.
- Approach Delay -Travel time delay encountered to an approach to an
intersection.
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