HEADWAY MODELING IN NORTHERN IRAQI TWO-LANE HIGHWAYS

  • Ayman A. AbdulMawjoud College of Engineering, University of Mosul - Iraq

Abstract

Headway is the time interval between passages of successive vehicles past a point on the highway. More than 8000 car headways were observed in 10 level and rolling terrain two-lane highways in northern Iraq to find the critical headway and headway distribution and modeling for these highways. It is found that the critical headways are ranges between 2.5 to 4.0 seconds with a suitable critical headway of 3.2 second. The best headway model consists of composite model, for free vehicles it is a shifted negative exponential distribution, while for constrained vehicles it is a lognormal distribution.

References

1. Botma, H. (1988). Effects on traffic operation of a slow moving vehicle on two-lane rural roads. Paper Presented at 14th ARRB Conference, Canberra, Australia.
2. Buckley, D. J. (1962). Road traffic headway distributions. Australian Road Research Board Proceeding, Volume 1, Part 1.
3. Chandra, S., & Kumar R. (2001). Headway modeling under mixed traffic on urban roads. Road and Transport Research.
4. Daou, A. (1966). On flow within platoons. Australian Road Research 2 (7).
5. Dawson, R. F. & Chimini, L. A. (1968). The hyperlang probability distribution-A generalized traffic headway model. Transportation Research Record No. 230, Transportation Research Board, Washington, D. C.
6. Dommerholt, W., & Botma, H. (1988). Model to determine operating quality on two-lane rural roads. Paper Presented at ITE 58th Annual Meeting, Vancouver, Canada.
7. Gerlough, D. L., & Huber, M. J. (1975). Traffic flow theory - A Monograph. Transportation Research Board, Special Report 165, Transportation Research Board, Washington, D. C.
8. Grecco, W. L., & Sword, E. C. (1968). Prediction of parameters for Schuhl’s headway distribution. Traffic Engineering No. 38 (5).
9. Greenberg, I. (1966). The long-normal distribution of headways. Australian Road Research, 2 (7).
10. Guell, D. L., & Virkler, M. R. (1988). Capacity analysis of two-lane highways. Transportation Research Record No. 1194, Transportation Research Board, Washington, D. C.
11. Highway Research Board. (1965).Highway Capacity Manual, Special report 87, Washington, D. C.
12. Highway Research Board. (1985). Highway Capacity Manual, Special report 209, Washington, D. C.
13. Highway Research Board. (2000). Highway Capacity Manual, Washington, D. C.
14. Hoban, C. J. (1980). Overtaking lanes on two-lane
rural highway. Ph. D. Dissertation, Monash University, Glayton, Victoria, Australia.
15. Hoban, C. J. (1983). Towards a review of the concept of level of service for two-lane rural roads. Australian Road Research, Volume, 13, No. 3.
16. Hoban, C. J. (1984). Bunching on two-lane rural roads. ARRB Internal report AIR359- Australian Road Research Board, Nunawading.
17. Johnson, G. P. (1995). Highway capacity manual misses mark on rural highway capacity. Proceedings of the 65th Annual Meeting, Institute of Transportation Engineers.
18. Kell, J. H. (1962). Analyzing vehicular delay at intersections through simulation. Highway Research Board Bulltin No. 356.
19. Keller, H. (1976). Effect of a general speed limit on platoon of vehicles. Traffic Engineering and Control, No. 18.
20. Krumins, I. (1981). Capacity and level of service of two-lane rural highways in Alberta. Ph. D. Thesis, Department of Civil Engineering, University of Calgary.
21. Krumins, I.V. (1988). Modeling headway distribution on two-lane highways. Report to Alberta Research Council, Edmonton.
22. May, A. D. Jr. (1965). Gap availability studies. Transportation Research Record No. 72, Transportation Research Board, Washington, D. C.
23. McLean, J. R. (1989). Two-lane highway traffic operations – Theory and Practice. Gordon and Breach Science Publisher New York.
24. Ovuworie, G. C., Darzentas, J., & McDowell, M. R. C. (1980). Free movers, followers and others: A reconsideration of headway distributions. Traffic Engineering and Control 28 (8/9).
25. Roy, R., & Saha, P. (2018). Headway distribution models of two-lane roads under mixed traffic conditions: a case study from India. European Transport Research Review, 10:3.
26. Saha, P., Roy, R., Sarkar, K., & Pal, M. (2017). Preferred time headway of drivers on two-lane highways with heterogeneous traffic. International letters, The International Journal of Transportation Research, Vol. 9.
27. Salter, R. J. (1990). Highways traffic analysis and design. Macmillan Publisher, Second Edition.
28. Schuhl, A. (1971). Probability theory applied to distribution of vehicles on two-lane highways. In Poisson and other distribution in the traffic, Eno Foundation for Transportation, Saugatuck.
29. Tolle, J. E. (1971). The lognormal headway distribution model. Traffic Engineering and Control, 13 (1).
30. Underwood, R. T. (1963). Traffic flow and bunching. Australian Road Research 8 (1). Australian Road Research Board.
31. Van As, C. (2004). The development of an analysis method for the determination of level of service of two-lane undivided highways in South Africa. Project Summary, South African National Roads Agency Limited.
32. Wolhuter, K. M. (1989). Headways on rural two-lane roads. Roads and Transport Technology Report DPVT 56, CSIR, Pretoria.
Published
2018-12-08
How to Cite
ABDULMAWJOUD, Ayman A.. HEADWAY MODELING IN NORTHERN IRAQI TWO-LANE HIGHWAYS. Academic Journal of Nawroz University, [S.l.], v. 7, n. 4, p. 1-8, dec. 2018. ISSN 2520-789X. Available at: <http://journals.nawroz.edu.krd/index.php/ajnu/article/view/265>. Date accessed: 20 jan. 2019. doi: https://doi.org/10.25007/ajnu.v7n4a265.
Section
Articles