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Travel Time Reliability as a Level of Service Measure for Urban and Inter-Urban Corridors in India


Affiliations
1 Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, India
2 CSIR-Central Road Research Institute, New Delhi 100 025, India
 

The present study demonstrates the application and usefulness of travel time reliability as a level of service (LOS) measure for urban arterial and inter-urban highway corridors on Indian roads. For travel time estimation, automatic vehicle license plate number data were collected through TrafficMon system. This system is a fully video-based enforcement system designed to measure the speed of vehicles passing in view of the camera, and read the vehicular license plate number. This system was implemented at the entry and exit side of the identified three study corridors and data were collected during morning and evening peak periods. The data were analysed and various travel time reliability measures were evaluated. The study also attempts to correlate reliability measures such as planning time (PT), buffer time (BT), planning time index (PTI) and buffer time index (BTI) with volume-to-capacity ratio which is the most widely used LOS measure for Indian roads. Analysis of results indicated that at LOS B the travel time of intercity highway was 40–46 sec/km, whereas it was 64–80 sec/km and 75–135 sec/km for urban uninterrupted and interrupted corridors respectively. The planning time for LOS B was more on urban arterial corridors when compared to inter-urban corridor for the same width of the carriageway. The upper limits of LOS B for PT were 132 sec/km and 63 sec/km for uninterrupted urban corridor and intercity highway corridor respectively. Other parameters of reliability like PTI and BTI were also evaluated and their values for different ranges of volume-capacity ratio were presented for identified corridors.

Keywords

Automatic License Plate Method, Buffer Time Index, Capacity, Travel Time Index, Travel Time Reliability, Urban Arterial.
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  • Asakura, Y. and Kashiwadani, M., Road network reliability caused by daily fluctuation of traffic flow. In Proceedings of the 19th PTRC, Summer Annual Meeting in Brighton, Seminar G, 1991, pp. 73–84.

  • FHWA, Travel time reliability: making it there on time, all the time. US Department of Transportation, Federal Highway Administration, 2006; http://www.ops.fhwa.dot.gov/publications/tt_reliability/index.htm

  • California PATH, Considering risk taking behaviour in travel time reliability, California Path Program, Institute of Transportation Studies, University of California, Berkeley, 2005; http://www.dot.ca.gov/research/researchreports/reports/2005/to_4110.pdf

  • Asakura, Y., Travel time reliability. In 3rd Center of Excellence (COE) Symposium, University of Washington, Seattle, USA, 2006.

  • Chen, A., Ji, Z. and Recker, W., Effect of route choice models on estimation of travel time reliability under demand and supply variations. In Proceedings of the 1st International Symposium on Transportation Network Reliability (eds Bell, M. G. H. and Iida, Y.), Pergamon, 2003, pp. 93–117.

  • Highway Capacity Manual, Transportation Research Board, Washington DC, 2010, 6th edn.

  • SHRP, Incorporation of Travel Time Reliability in to the Highway Capacity Nanual, 2012.

  • Roger, P. R. and Elena, S. P., The highway capacity manual: a conceptual and research history, Uninterrupted Flow, Springer, USA, 2014, vol. 1.

  • Kittelson, W. and Vandehey, M., Incorporation of travel time reliability into the HCM, SHRP 2 Reliability Project L08, 2013.

  • Margiotta, McLeod, Scorsone and Dowling, Travel time reliability as a service measure for urban freeways in Florida; http://www.dot.state.fl.us/planning/statistics/mobilitymeasures/Task13-ttr4urban.pdf

  • Lyman, K. and Bertini, R. L., Using travel time reliability measures to improve regional transportation planning and operations, Transportation research record (2046). J. Transport. Res. Board, 2008, 1–10.

  • Ravi Sekhar Ch. Kitazawa, T. Tanabe, J. Suga, Y. and Asakura, Y., Examining travel time reliability on Hanshin expressway network. J. Eastern Asia Soc. Transp. Stud. (EASTS), 2007, 7, 2274–2288.

  • Tanabe, J., Asakura, Y., Istuubo, S., Maekawa, T. and Okutan, T., Uncertainty of travel time and route choice behaviour – empirical analysis using probe person data. In Proceedings of the 3rd International Symposium on Transport Network Reliability (INSTR), 2007.

  • Trafficmon system, Kritikal Secure Scan Limited, B-29, Sector 57, Noida, India.

  • Chandra, S. and Kumar, U., Effect of lane width on capacity under mixed traffic conditions in India. J. Transp. Eng., ASCE, 2003, 129(2), 155–160.

  • MATLAB Software. MATALAB and Simulink for Technical Computing Software, Mathworks Inc, USA, 2012.


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  • Travel Time Reliability as a Level of Service Measure for Urban and Inter-Urban Corridors in India

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Authors

Anish Kumar Bharti
Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, India
Ravi Sekhar
CSIR-Central Road Research Institute, New Delhi 100 025, India
Satish Chandra
CSIR-Central Road Research Institute, New Delhi 100 025, India

Abstract


The present study demonstrates the application and usefulness of travel time reliability as a level of service (LOS) measure for urban arterial and inter-urban highway corridors on Indian roads. For travel time estimation, automatic vehicle license plate number data were collected through TrafficMon system. This system is a fully video-based enforcement system designed to measure the speed of vehicles passing in view of the camera, and read the vehicular license plate number. This system was implemented at the entry and exit side of the identified three study corridors and data were collected during morning and evening peak periods. The data were analysed and various travel time reliability measures were evaluated. The study also attempts to correlate reliability measures such as planning time (PT), buffer time (BT), planning time index (PTI) and buffer time index (BTI) with volume-to-capacity ratio which is the most widely used LOS measure for Indian roads. Analysis of results indicated that at LOS B the travel time of intercity highway was 40–46 sec/km, whereas it was 64–80 sec/km and 75–135 sec/km for urban uninterrupted and interrupted corridors respectively. The planning time for LOS B was more on urban arterial corridors when compared to inter-urban corridor for the same width of the carriageway. The upper limits of LOS B for PT were 132 sec/km and 63 sec/km for uninterrupted urban corridor and intercity highway corridor respectively. Other parameters of reliability like PTI and BTI were also evaluated and their values for different ranges of volume-capacity ratio were presented for identified corridors.

Keywords


Automatic License Plate Method, Buffer Time Index, Capacity, Travel Time Index, Travel Time Reliability, Urban Arterial.

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DOI: https://doi.org/10.18520/cs%2Fv114%2Fi09%2F1913-1922