Test: Queue and Delay Analysis - Civil Engineering (CE) MCQ

Control devices like signals cause control delay or fixed delay. Control delay includes both approach delay and time-in-queue delay. Approach delay is caused due to deceleration to and acceleration from a stop to stopped time delay.

Time-in-queue delay is the time between a vehicle joining the end of the queue at a signalized intersection and the time it takes to cross the intersection. Stopped time delay is the delay during which the vehicles are at rest.

Average delay time is calculated in License plate method by the relation given below, Average delay time = (Sum of all delay time) / (Number of matched license plates). While the delay time is calculated by, Delay time = Observed travel time – Free flow travel time.

License plate observations is the travel time and delay study that doesn’t require a test vehicle. It is one of the most common method for calculating travel time and delay.

In Moving-vehicle technique the test vehicle has to make a round trip on a test section from east to west direction. In Floating-car technique the test car attempts to pass as many vehicles as those that pass the test vehicle.