Passenger Car Equivalents on Downgrades of Two-Lane Roads

2020
Marko Subotić, Željko Stević, Edis Softić, Veljko Radičević

In this paper, empirical research about Passenger Car Equivalents (PCEs) on the longitudinal downgrade of two-lane roads in Bosnia and Herzegovina has been conducted in order to determine the inf luence of vehicle structure under free traffic f low conditions. The research has been carried out considering the classes of vehicles at cross-sections on the downgrade of two-lane roads. As a result, the negative inf luence of vehicle structure under free traffic f low conditions using passenger car equivalents (PCEs) has been determined. The results show that on the downgrade of two-lane roads, the value of passenger car equivalent decreases from the level terrain to the boundary minimum value for the determined downgrade g = −3.00%, after which its value starts to increase slightly. Based on the obtained values, the models calibrated with a second-degree polynomial have been developed to determine the average value of passenger car equivalent as a function of its boundary value. The paper also compares the results obtained by the developed models with the models from the Highway Capacity Manual under free traffic f low conditions. In addition, models for the percentage values of PCE15%, PCE50% and PCE85% have been established.

Atslēgas vārdi
Passenger car equivalent, Traffic operation, Two-lane road
DOI
10.7250/bjrbe.2020-15.499
Hipersaite
https://bjrbe-journals.rtu.lv/article/view/bjrbe.2020-15.499

Subotić, M., Stević, Ž., Softić, E., Radičević, V. Passenger Car Equivalents on Downgrades of Two-Lane Roads. The Baltic Journal of Road and Bridge Engineering, 2020, Vol. 15, No. 4, 152.-173. lpp. ISSN 1822-427X. e-ISSN 1822-4288. Pieejams: doi:10.7250/bjrbe.2020-15.499

Publikācijas valoda
English (en)