Introduction:
One of the major functions of an Advanced Traveler Information System (ATIS) is route guidance. A key sub-problem of route guidance is the estimation of travel times on links in a network. The link travel time estimation problem is to estimate the travel time that would be incurred by a vehicle entering the link at some time t. Thus far, there have been two approaches to the link travel time estimation problem: (i) dynamic traffic assignment and (ii) statistical approaches based on real or simulated travel time data. In this paper, we present some investigations of the link travel time estimation probe via the second approach. Direct measurements of travel times has recently become possible with the advent of network surveillance technologies such as probe vehicles and video cameras that are capable of matching a vehicle at two different locations.
tr52.pdf