Development of an Evaluation System of the Reliability of Travel Time of Freeways and the Thresholds of Corresponding Indicators

The reliability of travel time is an important indicator for evaluating the efficiency as well as the level of service of freeways .After the previous studies are reviewed ,an evaluation system of the reliability of travel time of free-way is developed to provide more accurate travel time information for managers and users of freeways .Questionnaires to sample users of freeways are collected to determine the thresholds of corresponding indicators .Finally ,a new method for determining the thresholds of the evaluation indicators is developed based on the Florida Algorithms .