Capacity Analysis and Level of Service Estimation for a Section of the Highway Based on HCM2016 (Case Study: Shahid Sadr Highway Class-Bridge)

Document Type : Research Paper


1 Assistant Professor of Civil Engineering,North Tehran Branch, Islamic Azad University, Tehran, Iran

2 Ph.D. Candidate, Iran University of Science and Technology, Tehran, Iran

3 MSc, Department of Civil Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran


Annually, traffic problems ranging from congestion, air and noise pollution, abundant accidents, unacceptable increases in travel time, and various types of damages are the advance of most countries, especially in developing countries. Environmental pollution, casualty, and financial costs, as well as accidents, increased fuel consumption, the extent of resources allocated to build the network, and the huge cost of construction of various transport systems, as well as other side costs, destroy large amounts of human and economic resources in the country. It becomes. Therefore, the prediction of traffic for a pre-construction route as well as analyzing and estimating the capacity and prediction of future demand, due to the expansion and improvement of the network and preventing the creation of problems developed from increasing demand and lack of facilities, and can have problems The existing network minimizes the country's roads. Functional criteria are determined by defining the concept of level-of-service (LOS). In this research, the analysis of highway capacity was obtained using the data from the Shahid Sadr class-bridge in Tehran, based on the 415, HCM2016 regulations and headway methods, and then the results were compared using Synchro and Aimsun software.


  • Cassidy, M., May, A. "Proposed analytical technique for estimating capacity and level of service of major freeway weaving sections", Transportation Research Record, (1991).


  • Minderhoud, M., Botma, H., Bovy, P. "Assessment of roadway capacity estimation methods", Transportation Research Record: Journal of the Transportation Research Board, 1572, Issue: 1, pp: 59-67. (2009).


  • Yang, H., Bell, M., H. Meng, Q., "Modeling the capacity and level of service of urban transportation networks", Transportation Research Part B: Methodological, Elsevier, vol. 34(4), pp: 255-275, May, (2000).


  • Behbahani, H., Abtahi, M. “An improved methodology for measurement of uninterrupted–flow capacity affected by pavement condition”, Journal of Enteghlal, Vol. 26, No.1; pp: 79-91, (2007).


  • Shariat Mahimani, A., Mansoorkhaki, A., Nosrati, H. "Alternative benchmarking of performance index of suburban two-lane highways", Traffic Management Studies, Fifth year, No. 17 (2010).


  • Tamanaei, M., Abtahi, M., Haghshenas, H. “Analysis of time distance distribution of vehicles in day and night conditions under heavy traffic flow”, Transportation Research Journal, Vol 9, No. 3, pp: 223-234 (2012).


  • Foroutan, A.A., Shariat Mahimani, A., Dehestani, R. “Evaluation of road capacity regulations in determining the capacity of highway lane change areas”, 13th International Conference on Transportation and Traffic Engineering, (2012).


  • Amini, B., Shahrad, S. "Comparative evaluation of co-riding coefficients of heavy vehicles on two lane highway in Iran based on the methods of difference in speed and headways", Journal of Transportation Research, No. 4 (2012).


  • Soltani, A., Panahi, N. "Capacity assessment of two-lane highways based on structural features and connection with adjacent activities. Case study of Shiraz, district 6", Quarterly Journal of Urban Research and Planning, No. 19, (2014).


  • Velmurugan, S., Errampalli, M., Ravinder, K., Sitaramanjaneyulu, K., Gangopadhyay, S. "Critical evaluation of roadway capacity of multi-lane high speed corridors under heterogeneous traffic conditions through traditional and microscopic simulation models", Journal of Indian Roads Congress, (2010).


  • Biswas, S., Singh, B., Saha, A. "Assessment of level of service on urban arterials: a case study in kolkata metropolis." International Journal for Traffic and Transport Engineering, pp: 303-313, (2016).


  • Pursula, M., Enberg, A. "Characteristics and level-of-service estimation of traffic flow on two-lane rural roads in Finland", Transportation Research Record 1320, pp: 135-144, (2019).