BENEFITS AND COSTS FROM THE CALTRANS IRIS OPEN TRAFFIC MANAGEMENT SYSTEM DEMONSTRATION STUDY

摘要

Providing a well-managed transportation infrastructure is an essential function of a public transportation agency. Intelligent Transportation System (ITS) applications such as Advanced Traffic Management Systems (ATMS) improve safety and fuel efficiency, and reduce congestion. However, the software life-cycle costs of these systems often place diem beyond die reach of small and medium-sized agencies. This paper discusses die results of die first implementation of die Intelligent Roadway Information System (IRIS) open ATMS outside of Minnesota. The California Department of Transportation (Caltrans) IRIS demonstration study implemented IRIS widiin a midsized urban/rural Caltrans district and two rural districts diat otherwise could not afford an ATMS. Results show dramatic cost savings compared widi an existing proprietary ATMS system, increased capabilities and reliability, and a number of secondary benefits derived from diis multi-agency collaborative approach.