Transportation Statistics and Microsimulation

34    ◾    Transportation Statistics and Microsimulation

same frequency, then, in the strictest sense, there is no mode. However,

when describing the shape of the data distribution, a mode is sometimes

interpreted as a bump, and thereby in this interpretation more than one

mode can be dened. e terms unimodal, bimodal, and multimodal are

used based on such an explanation and are common to the transporta-

tion lexicon. For example, the travel time distribution of vehicles passing

through a signalized intersection is oen referred to as bimodal because

there are two distinct bumps: those representing vehicles that are stopped

by the trac signa ...