Impact of Horizontal Curves and Percentage of Heavy Vehicles on Right Lane Capacity at Multi-lane Highways

  • Ahmed Mohamed Semeida Assistant Professor of Highways and Traffic Engineering, Department of Civil Engineering, Faculty of Engineering, Port-Said University
Keywords: multi-lane highway, road geometric properties, traffic characteristics, right lane capacity, artificial neural networks,


In the present research, the influence of road geometric properties and traffic characteristics on the right lane capacity value is explored for horizontal curves. The non-traditional procedure (artificial neural networks - ANNs), is adopted for modelling. The research utilizes 78 horizontal curves that provide the traffic and road geometry data, of which55 curves are classified as four-lane and the rest as six-lane ones. Two types of models are introduced to explore the right lane capacity as capacity at curves, and the capacity loss between curves and tangents. The results show that, for horizontal curves, the most effective variables affecting both road types are the percentage of heavy vehicles in traffic composition (HV) followed by radius of curve (R), and the lane width (LW). Furthermore, the capacity loss is also highly affected by R followed by HV. The derived outcomes present a remarkable move towards the beginning of an Egyptian highway design guide.

Author Biography

Ahmed Mohamed Semeida, Assistant Professor of Highways and Traffic Engineering, Department of Civil Engineering, Faculty of Engineering, Port-Said University

Civil Engineering

Highways and Traffic Engineering


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How to Cite
Semeida AM. Impact of Horizontal Curves and Percentage of Heavy Vehicles on Right Lane Capacity at Multi-lane Highways. Promet [Internet]. 2017Jun.27 [cited 2024Jun.16];29(3):299-0. Available from: