encyclopedia

EFFECTIVE DEMAND

The number of people or vehicles prepared to travel in a given situation, at a given price (fare or fee). (TRB)

EFFECTIVE VELOCITY

(Also called Average Speed.) The average velocity at which a vehicle travels. For transit vehicles, it includes dwell time at stops or station, acceleration, and deceleration. (TRB)

EFFICIENCY

The ratio of output (e.g. level of service provided) to input (e.g. cost of resource usage), that is, providing the desired result with the minimum of effort, expense, waste, and so on (doing things right). (TRB)