Civil and Environmental Engineering


Date of this Version



Transportation Research Record: Journal of the Transportation Research Board, No. 2035 (2007): 69-80. DOI: 10.3141/2035-08.


Copyright 2007, Transportation Research Board of the National Academies. Used by permission.


Vehicle delay and queue length are quantitative measures of intersection performance. The technological advancement in the field of vehicle sensors and traffic controllers has reached a point where it has enabled efficient measurement of these performance measures. Two techniques are presented for real-time measurement of vehicle delay and queue length at a signalized Intersection, and these automated delay and queue estimates are compared with manually ground-truthed measurement. These techniques were evaluated at an instrumented intersection in Noblesville, Indiana. The root-mean-square error by both techniques was below 0.7 veh-s for-estimation of average delay and less than 0.15 vehicle for estimation of average maximum queue length, both on a cycle-by-cycle basis.