Describe the three components of total control delay for a given lane group.

Question

What will be an ideal response?

Answer 1

Uniform Delay. The uniform delay is that which will occur in a lane group if vehicles arrive uniformly at the intersection, and saturation does not occur during any cycle. Also, only one effective green time for the cycle and one saturation flow rate for the analysis period are assumed.

Incremental Delay. Incremental delay takes into consideration that the arrivals are not uniform but random, with the number of arrivals varying from cycle to cycle. It also takes into consideration the delay that occurs when demand is higher than the capacity during the analysis period.

Initial Queue Delay. This delay occurs as a result of an initial unmet demand (Ob) vehicles at the start of the analysis period T. That is, a residual event of length Qb exists at the start of the analysis period. This does not include vehicles in queue due to the random variation in demand from cycle to cycle.