This report represents the findings of a study that demonstrates the feasibility of estimating link travel time and speed in real-time for rural, mountainous sections of interstate freeway in Colorado using vehicles instrumented with global positioning system receivers, serving as probes in traffic streams. The system configuration developed includes a cost-effective, portable GPS deployment unit, communication links to a server PC and an integrated prototype systems for vehicle tracking and estimating link travel time statistics. This study was carried out in two phases. The objective of the first phase was to identify a cost-effective means of monitoring traffic within a rural, mountainous stretch of the I-70 freeway. An algorithm was developed to estimate average link speed, travel time and the standard error of estimates to provide user information on the reliability of the estimates based on the probe data. The algorithm was tested for different traffic conditions and geometric characteristics of links. In the second phase of the project, a real-time demonstrational prototype was developed to receive, process and estimate link travel time and speed statistics in real-time. The system was tested off-line and on-line on field data received from the I-70 corridor. In addition, GPS receivers were deployed using a commercial vanpool service and the system was evaluated further.
Estimating Link Travel Time on I-70 Corridor: A Real-Time Demonstration Prototype
2000
80 pages
Report
No indication
English
Transportation & Traffic Planning , Transportation , Road Transportation , Traffic surveillance , Rural areas , Mountain driving , Prototypes , Demonstration projects , Global positioning systems , Travel time , Vehicle detection , Communication networks , Speed estimation , Real time operations , Algorithms , Field tests
Estimating Corridor Travel Time by Using Transit Vehicles as Probes
Transportation Research Record | 2003
|Estimating Corridor Travel Time by Using Transit Vehicles as Probes
Online Contents | 2003
|New Methodology for Estimating Travel Time Reliability in a Freeway Corridor
British Library Conference Proceedings | 2005
|Travel Time Prediction Model of Freeway Corridor Based on Real-Time Safety Reliability
DOAJ | 2020
|