Effect of Vehicle Composition and Delay on Roundabout Capacity under Mixed Traffic Conditions

Authors

  • Dodappaneni Abhigna Department of Civil Engineering, National Institute of Technology, Warangal, Telangana, India Author
  • Sindhu Kondreddy Department of Civil Engineering, National Institute of Technology, Warangal, Telangana, India Author
  • K. V. R. Ravi Shankar Department of Civil Engineering, National Institute of Technology, Warangal, Telangana, India Author

DOI:

https://doi.org/10.5604/08669546.1225456

Keywords:

critical gap, vehicle type, delay, capacity, simulation, circulation flow

Abstract

Roundabouts are replacing conventional unsignalized intersections in many parts of the world (Polus and Shmueli, 1997). Capacity estimation is necessary for designing a new roundabout, to analyze and improve the existing roundabout facilities. There are several methods to estimate the capacity of the roundabout, but most of them are for homogeneous lane based traffic conditions and not applicable for mixed traffic conditions. This study tries to find out the applicability of the existing methods to mixed traffic conditions, identify the effect of vehicle composition, travel time and delay on capacity. In this study, data was collected from two roundabouts located in Mysore, Karnataka and Rajahmundry, Andhra Pradesh in India. Capacities for both the roundabouts are calculated using the existing methods and compared. VISSIM simulation model has been developed and analyzed for different vehicle compositions scenarios. It was observed that vehicle composition of the traffic influences the roundabout capacity. Since the entry capacity of a roundabout varies significantly with the vehicle composition of the traffic at the roundabout, it is necessary to incorporate this factor into the existing capacity estimation models.

References

AL-MADANI, H. M. N., 2012. Capacity of Large Dual and Triple-Lanes Roundabouts during Heavy Demand Conditions. Arabian Journal for Science and Engineering, 38,pp. 491–505.

ANTONIO, L. P. V., SECO, Á. J. M. and SILVA, A. M. C. B., 2013. Comparison of Procedures to Estimate Critical Headways at Roundabouts. Promet- Traffic and Transportation, 25(1), pp. 43-53.

ASHWORTH, R., and FIELD, J.C., 1973. The Capacity of Rotary Intersections. Journal of the Institution of Highway Engineers, 20(3), pp. 14-21.

CHODUR, J., and BAK, R., 2016. Study of driver behaviour at turbo-roundabouts. Archives of Transport, 38(2), pp. 17-28.

CHRIS, L. and NAEEM, M. K. (2013). Prediction of Capacity for Roundabouts Based on Percentages of Trucks in Entry and Circulating Flows. Transportation Research Record: Journal of the Transportation Research Board, 2389, pp. 30-41.

HCM, 2000. Highway Capacity Manual (2000). Transportation Research Board, National Research Council, Washington, DC.

HCM, 2010. Highway Capacity Manual (2010) Transportation Research Board, National Research Council, Washington, DC.

KUSUMA, A. and HARIS, N. K., 2011. Critical Gap Analysis of Dual Lane Roundabouts. Procedia Social and Behavioral Sciences, 16, pp. 709–717.

MACIOSZEK, E., 2015. The road safety at turbo roundabouts in Poland. Archives of Transport, 33(1), pp. 57-67.

NEDAL, R. T. and SYED M. R., 2009. A Comparative Analysis of Currently used Microscopic and Macroscopic Traffic Simulation Software. Arabian Journal for Science and Engineering, 34, pp. 121-133.

POLUS, A. and SHMUELI, S., 1997. Analysis and Evaluation of the capacity of Roundabouts. Transportation Research Record, 1572, pp. 99-104.

RAMU, A., HARI, K. G., LAKSHMI, D. V. and RAO, K. R., 2015. Comparative evaluation of roundabout capacities under heterogeneous traffic conditions. Journal of Modern Transportation, 23(4), pp. 310–324.

THAMIZH, A. and REEBU, Z. K., 2005. Methodology for Modelling Highly Heterogeneous Traffic Flow. Journal of Transportation Engineering, 131, pp. 544-551.

VINCENZO, G. and ROSOLINO, V., 2008. Roundabout Intersections: Evaluation of Geometric and Behavioural Features with Vissim. National Roundabout Conference, Transportation Research Board.

Downloads

Published

2016-12-31

Issue

Section

Original articles

How to Cite

Abhigna, D., Kondreddy, S., & Shankar, K. V. R. R. (2016). Effect of Vehicle Composition and Delay on Roundabout Capacity under Mixed Traffic Conditions. Archives of Transport, 40(4), 7-14. https://doi.org/10.5604/08669546.1225456

Share

Most read articles by the same author(s)

1 2 3 4 5 6 7 8 9 10 > >> 

Similar Articles

1-10 of 142

You may also start an advanced similarity search for this article.