The objectives of this study were to examine: (1) the performance of automated work zone information system (AWIS); and (2) the volumes at which congestion began to occur. Studies were conducted at rural freeway work zones in Arkansas, where two lanes in a direction were reduced to one lane. The AWIS system in use had detectors spaced at one mile intervals; it correctly identified the presence of backups approximately 88% of the time. Congestion and slowdowns were found to occur at much lower volumes than reported in the literature, in some cases as low as 800 to 900 vehicles per hour. All of the observed backups were propagated from within the single lane section; none resulted from merging congestion. Conditions which were observed to contribute to the occurrence of backups, and which could be controlled, were listed.
Evaluation of Automated Work Zone Information Systems
2002
54 pages
Report
No indication
English
Problem-Solving Information for State & Local , Transportation & Traffic Planning , Road Transportation , Highway Engineering , Construction sites , Speed zones , Traffic control devices , Performance evaluation , Accident prevention , Real time operations , Automation , Traffic congestion , Information systems , Traffic capacity , Traffic information signs , Lane closure signs , Rural areas , Arkansas , Traffic flow , Traffic volume , Work zones
Evaluation of Automated Work Zone Information Systems
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