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An Analysis of the Start-up Delay and Safety for Signalized Intersections: Impact of Left-Turn Phasing Sequences

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Advances in Human Aspects of Transportation

Part of the book series: Advances in Intelligent Systems and Computing ((AISC,volume 484))

Abstract

This paper aims to investigate the start-up delay at signalized intersections in Abu Dhabi (AD) city, UAE. The impact of some external factors that may affect the start-up delay in examined including; left turn phasing sequences (split/lead/lag), movement turning (through/left), intersection location (CBD/non-CBD) and day time (peak/off-peak). The paper also addressed the impact of illustrating lead/lag phasing system on the performance of traffic and safety. A significant number of observations were obtained by using automated license plate recognition cameras at 66 different intersection approaches. The results show that the estimated mean value of the start-up delay is 2.201 s with a standard deviation of 1.823 s. In conclusion, the statistical tests show significant difference in start-up delay the have between observed for through, left, at CDB and non-CDB area and between split and lead/lag phasing. However, no significant difference between peak and off-peak periods and between split and lead phasing are recognized. In addition, the lead/lag phasing improved the traffic performance by reducing the total delay at intersections but has a negative impact on the safety.

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Authors and Affiliations

  1. Traffic and Patrol Directorate, Abu Dhabi Police, Abu Dhabi, United Arab Emirates

    Mohamed Shawky, Abdulla Al-Ghafli & Hussain Al-Harthi

  2. Faculty of Engineering, Ain Shams University, Cairo, Egypt

    Mohamed Shawky

Authors
  1. Mohamed Shawky
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  2. Abdulla Al-Ghafli
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  3. Hussain Al-Harthi
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Corresponding author

Correspondence to Mohamed Shawky .

Editor information

Editors and Affiliations

  1. Faculty of Engineering and the Environme, University of Southampton Faculty of Engineering and the Environme, Southampton, United Kingdom

    Neville A. Stanton

  2. Purdue University , West Lafayette, IN, USA

    Steven Landry

  3. Dipartimento di Architettura, Università degli Studi “G.d’Annunzio” Chiet, Pescara, Italy

    Giuseppe Di Bucchianico

  4. Dipartimento di Architettura, Università degli Studi “G.d’Annunzio” Chiet, Pescara, Italy

    Andrea Vallicelli

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Shawky, M., Al-Ghafli, A., Al-Harthi, H. (2017). An Analysis of the Start-up Delay and Safety for Signalized Intersections: Impact of Left-Turn Phasing Sequences. In: Stanton, N., Landry, S., Di Bucchianico, G., Vallicelli, A. (eds) Advances in Human Aspects of Transportation. Advances in Intelligent Systems and Computing, vol 484. Springer, Cham. https://doi.org/10.1007/978-3-319-41682-3_18

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  • DOI: https://doi.org/10.1007/978-3-319-41682-3_18

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-41681-6

  • Online ISBN: 978-3-319-41682-3

  • eBook Packages: EngineeringEngineering (R0)

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