Effect of vehicle composition and delay on roundabout capacity under mixed traffic conditions
| Autor: | Dodappaneni Abhigna, Sindhu Kondreddy, K. V. R. Ravi Shankar |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Archives of Transport, Vol 40, Iss 4, Pp 7-14 (2016) |
| Druh dokumentu: | article |
| ISSN: | 0866-9546 2300-8830 08669546 |
| DOI: | 10.5604/08669546.1225456 |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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