Structure and Calibration of Multi-nser Class Travel Time Functions



Structure and Calibration of Multi-nser Class Travel Time Functions

Authors

BLIEMER M C J, Delft University of Technology, The Netherlands

Description

Nowadays, traffic floods the road networks in many countries. The supply of infrastructure cannot keep up with the increasing traffic demand. Several solutions to this problem have been proposed. Besides direct measures, such as building more infrastructu

Abstract

Nowadays, traffic floods the road networks in many countries. The supply of infrastructure cannot keep up with the increasing traffic demand. Several solutions to this problem have been proposed. Besides direct measures, such as building more infrastructure or curbing traffic demand, one can also pursue a more efficient usage of the road infrastructure. For example, by guiding the traffic through the network using dynamic route information panels (DRIP's) or by ramp metering, the network trzffic circulation may be improved. The effects of dynamic trz~c management (DIM) can he predicted by using dynamic traffic assignment (DTA) models or simulation models. For example, in Bliemer and Westerman (1997), the potential effects of departure time shills have been estimated. In real-time applications, traffic control centers may use these models to forecast short-term traffic conditions and take actioils based on the model outcomes. In off-line applications, these models can be used to compute the effects of certain traffic management systems on the traffic flows on the network. This paper proposes an extension to the travel time functions used in dynamic traffic assignment models. These extensions aim at more specific and more realistic outcomes of the model, and consequently to better traffic management.

Publisher

Association for European Transport