Assessment of Level of Service Measures for Two-Lane Intercity Highways under Heterogeneous Traffic Conditions

Many researchers have studied the performance of two-lane intercity highways with the help of different measures. In the current study, performance of such highways under heterogeneous traffic condition was examined by using several speed and followers related measures. The data were collected from five study sites located in different regions of India. A new methodology was proposed where followers were identified by using a Speed Difference (SD) (between two consecutive vehicles) limit range of -4 to +10 km/hr and gap threshold value (lower than a particular gap value) of 10 sec. By using acceptance curve method different critical gap values were suggested for each site to identify the followers. Out of all the performance measures, number of follower as a proportion of capacity (NFPC) and follower density (FD) were found to be the best and second best parameters. Finally, different LOS ranges were proposed based on NFPC using cluster analysis.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author