MATEC Web Conf.
Volume 124, 20172017 6th International Conference on Transportation and Traffic Engineering (ICTTE 2017)
|Number of page(s)||7|
|Section||Traffic Safety and Risk Assessment|
|Published online||29 September 2017|
Impacts of Large Vehicles on Traffic Safety in Freeway Interchange Merging Areas and Improvement Measures
School of Transportation, Southeast University, Si Pai Lou #2, Nanjing 210096, China
In order to work out the characteristics of traffic operation on freeway interchange merging areas under different ratio of large vehicles, aerial photography technique based on unmanned aircraft and other observation device were used to investigate the merge section traffic data firstly. Based on survey data and actual traffic characteristics, the paper then established simulation models with VI SSIM with calibrated car-following and lane changing behaviour models. Next, the paper analysed the influence of traffic volume and acceleration lane length under various traffic compositions to evaluate safety status of interchange merge sections by traffic conflict technique and speed consistency index. Finally, two kinds of safety promotion strategies, speed limit and setting forbidden line, were evaluated and the results indicated these measures can raise safety level by about 10%∼15% under certain conditions, which were determined as the best applicable conditions.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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