Evaluation of travel time reliability in urban areas using mobile navigation applications in Jordan

This study aims to assess the Travel Time Reliability (TTR) in urban areas Irbid city, Jordan, using a mobile application (Ultra GPS Logger), which retains current location, speed, and time every three seconds. The evaluated TTR at Origin-Destination (OD) level segment level. Each OD was divided into several segments with different interruption types determine have lowest reliability most extended delay. evaluation based on measures according Federal Highway Administration (FHWA), such as buffer time, Buffer Index (BI), (TTI), 95th percentile, standard deviation, Coefficient of Variation. Chi-Square test for independence carried association between period during day, day week, section type BI Level, other combinations. Results showed that normal sections, without traffic signals roundabouts, had significant effect compared 3-Leg intersections, 4-Leg roundabouts. also confirmed trips does not mean there is no delay or congestion, but some certainty travel prediction specific route journey.