American Journal of Traffic and Transportation Engineering

Volume 4, Issue 1, January 2019

  • Study on Gradation Improvement of Gravel and Sand for Surface Layer of Railway Subgrade by Blending Method

    Yang Jingwei

    Issue: Volume 4, Issue 1, January 2019
    Pages: 1-6
    Received: 26 September 2018
    Accepted: 22 December 2018
    Published: 25 March 2019
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    Abstract: As the direct foundation of the track, the surface layer of high-speed railway subgrade bed is one of the important parts of the subgrade. Its main function is to transmit and spread the vertical load of the upper ballast bed and the vehicle dynamic load to maintain the long-term stability of the subgrade bed surface. So, the material for the surfa... Show More
  • Spatial and Temporal Analysis of Seasonal Traffic Accidents

    Homayoun Harirforoush, Lynda Bellalite, Goze Bertin Bénié

    Issue: Volume 4, Issue 1, January 2019
    Pages: 7-16
    Received: 17 January 2019
    Accepted: 21 February 2019
    Published: 26 April 2019
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    Abstract: This paper presents an approach to analyze spatial and temporal (spatiotemporal) patterns of traffic accidents and to organize them according to their level of significance. This approach was tested using three years (2011-2013) of traffic accident data for Sherbrooke. The spatiotemporal patterns of traffic accidents were analyzed using kernel dens... Show More
  • Influence of Recycling Agent on Surface Free Energy of Asphalt Cement

    Saad Issa Sarsam, Rana Khalid Hamdan

    Issue: Volume 4, Issue 1, January 2019
    Pages: 17-23
    Received: 24 March 2019
    Accepted: 22 April 2019
    Published: 9 May 2019
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    Abstract: Reliable surface free energy characterization is required in order to implement the suitable recycling agent into aged asphalt. One proven method to estimate asphalt surface free energy is to calculate it using contact angles measured with various liquids. The efficiency of recycling agent in terms of its impact on rheology and surface free energy ... Show More
  • Assessing Pedestrian Environment: A Review on Pedestrian Facilities in Rajshahi City Corporation Area

    Aftabun Nahar, Abdul Mohaimenu Mim, Md. Mostafizur Rahman

    Issue: Volume 4, Issue 1, January 2019
    Pages: 24-30
    Received: 3 March 2019
    Accepted: 9 April 2019
    Published: 15 May 2019
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    Abstract: Traffic congestion and lack of public pedestrian space are faced by most urban areas in Bangladesh. Provision of facilities for pedestrian is not increased as a rate of increase in population. Consequently pedestrians are at greater risk for their safety, especially in the commercial zones of large cities. In Rajshahi, walkways are constructed rece... Show More
  • Predicting CBR Values of Black Cotton Soil Stabilized with Cement and Waste Glass Admixture Using Regression Model

    Ibrahim Abdulkarim Ikara, Ali Musa Kundiri, Abbagana Mohammed

    Issue: Volume 4, Issue 1, January 2019
    Pages: 31-36
    Received: 7 March 2019
    Accepted: 22 April 2019
    Published: 15 May 2019
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    Abstract: In highway constructions, sub-grade and sub-base soil stabilization has been used as one of the prime and major process for many years in order to improve the engineering properties of soil. The strength of theses layers is indicated by their California bearing ratio (CBR) value which is quite expensive and time consuming. In order to overcome this... Show More