Impact of Roadside Fixed Objects in Traffic Conditions

Authors

  • N. Hazim Department of Civil Engineering, Al-Ahliyya Amman University, Jordan
  • L. Shbeeb Department of Civil Engineering, Al-Hussain Technical University, Jordan
  • Z. Abu Salem Department of Civil Engineering, Applied Science Private University, Jordan

Abstract

Highway Capacity Manual (HCM) assumes that traffic flow rates are equally distributed between lanes, which is not always the case. Lane distribution and speed are influenced by lateral clearance on the roadsides. In Jordan, the absence of well-marked lanes and poor lane discipline results in under-utilizing of the freeway capacity. The objective of this study is to look into the impact of the presence of roadside objects on lane distribution and speed. Test sections were selected on six-lane freeway segments located in sub-urban areas on tangent highway segments. Speed measurements and distribution counts made for each lane on a directional three-lane segment of the freeway. The results showed that lane distribution significantly varies depending on lateral clearance and traffic. As lateral displacement increases, right-lane-use and left-lane-use increases while the middle-lane use remains almost at the same level. Average speed increases as the lateral clearance increases. The results also showed that average speed and lane distribution for 1.5m lateral clearances are very similar to no obstacle conditions. The impact of an obstacle is more significant on the right lane while the use of the left lane fluctuates with a significant increase if traffic flow rates reach high levels.

Keywords:

lane distribution, obstacle, speed

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References

M. M. M. Abdel-Aal, A. E. A. El-Maaty, H. A. A. Samra, “Factors affecting road capacity under non-ideal conditions in Egypt”, Nova Journal of Engineering and Applied Sciences, Vol. 7, No. 1, pp. 1-13, 2018

M. R. Amin, J. H. Banks, “Variation in freeway lane flow patterns with volume, time of day, and location”, Transportation Research Record, Vol. 1934, No. 1, pp. 132–139, 2005 DOI: https://doi.org/10.1177/0361198105193400114

F. J. Breuer, B. Beckmann, “Geschwindigkeit und spurenbelegung auf autobahnen. Schriftenreihe stadt – region”, Land des Institutes für Stadtbauwesen, Vol. 6, No 1969. RWTH Aachen, 1969 (in German)

M. Ghasemian, S. Amini, M. Princevac, “The influence of roadside solid and vegetation barriers on near-road air quality”, Atmospheric Environment, Vol. 170, pp. 108-117, 2017 DOI: https://doi.org/10.1016/j.atmosenv.2017.09.028

F. Hall, T. Lam, “The characteristics of congested flow on a freeway across lanes, space and time”, Transportation Research A, Vol. 22, No. 3, pp. 45-56, 1988 DOI: https://doi.org/10.1016/0191-2607(88)90062-3

R. Hotop, “Untersuchung der Verkehrsqualitat auf zwei- und dreispurigen BAB”, Richtungsfahrbahnen. Straßenverkehrstechnik, Vol. 19/1975, 1975 (in German)

D. Heidemann, “Distribution of traffic to the individual lanes on multilane unidirectional roadways”, Second International Symposium on Highway Capacity, Melbourne, Australia, 1994

T. Jensen, “Weather and road capacity”, Annual Transport Conference at Aalborg University, 2014

J. Lee, B. Park, “Lane flow distributions on basic segments of freeways under different traffic conditions”, 89th Annual Meeting of the Transportation Research Board, Washington, USA, January 10-14, 2010

W. Leutzbach, F. Busch, Spurenwechselvorgange auf dreispurigen BAB–Richtungsfahrbahnen,. University of Karlruhe, 1984 (in German)

A. Maurya, S. Das, S. Dey, S. Nama, “Study on speed and time-headway distributions on two-lane bidirectional road in heterogeneous traffic condition”, Transportation Research Procedia, Vol. 17, pp. 428-437, 2016 DOI: https://doi.org/10.1016/j.trpro.2016.11.084

L. Putranto, N. Setyarini, “Vehicle composition and lane distribution in multilane highways in Indonesian cities”, Procedia-Social and Behavioral Sciences, Vol. 16, pp. 374-381, 2011 DOI: https://doi.org/10.1016/j.sbspro.2011.04.458

S. Samoili, A. G. Dumont, N. Geroliminis, “Dynamics of lane distribution flows in freeways”, 13th Swiss Transport Research Conference, Monte Verita, Switzerland, April 24-26,2013

U. Sparmann, “Spurwechselvorgange auf zweispurigen BAB – Richtungsfahrbahnen”, Forschung Straßenbau und Straßenverkehrstechnik, Vol. 263/1978, 1978 (in German)

R. Tay, A. Churchill, “Effect of different median barriers on traffic speed”, Canadian Journal of Transportation, Vol. 1, No. 1, pp. 56-66, 2007

N. Wu, “Equilibrium of lane flow-distribution on motorways”, Transportation Research Record, Vol. 1965, No. 1, pp. 48–59, 2006 DOI: https://doi.org/10.1177/0361198106196500106

S. A. Arhin, A. Gatiba, “Predicting injury severity of angle crashes involving two vehicles at unsignalized intersections using artificial neural networks”, Engineering, Technology & Applied Science Research, Vol. 9, No. 2, pp. 3871-3880, 2019 DOI: https://doi.org/10.48084/etasr.2551

M. Touahmia, “Identification of risk factors influencing road traffic accidents”, Engineering, Technology & Applied Science Research, Vol. 8, No.1, pp. 2417-2421, 2018 DOI: https://doi.org/10.48084/etasr.1615

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How to Cite

[1]
Hazim, N., Shbeeb, L. and Abu Salem, Z. 2020. Impact of Roadside Fixed Objects in Traffic Conditions. Engineering, Technology & Applied Science Research. 10, 2 (Apr. 2020), 5428–5433. DOI:https://doi.org/10.48084/etasr.3226.

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