TY  - JOUR
PY  - 2021//
TI  - Improved volume-delay function for two-lane rural highways with impact of road geometry and traffic-flow heterogeneity
JO  - Journal of transportation engineering, Part A: Systems
A1  - Šarić, Ammar
A1  - Lovric, Ivan
SP  - e04021066
EP  - e04021066
VL  - 147
IS  - 10
N2  - Two-lane rural highways represent the absolute majority of road networks globally, but there is a noticeable lack of research on this type of road for traffic planning purposes. This paper presents the relationship between average flow speed on two-lane rural highways and traffic volume and composition, and roadway horizontal and vertical geometric characteristics, expressed in the form of a volume-delay function. A new volume-delay function was developed through a combination of field research and traffic microsimulation. Field research was conducted on the main road network in Bosnia and Herzegovina. In total, more than 1 million simulations of different traffic situations were performed in an automated process. The results showed that a combination of traffic composition and geometric features (bendiness and longitudinal grade) has a crucial impact on average flow speed. The new proposed model predicts average flow speed in various traffic situations with high reliability (
LA  - en
SN  - 2473-2907
UR  - http://dx.doi.org/10.1061/JTEPBS.0000575
ID  - ref1
ER  -