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Traffic engineering improvement design examples of primary road accident patterns

  • Date:2019-03-06
  • Update:2019-03-06
  • Department:IOT

Project Overview:

  The number of incidents in Taiwan in the past decade has grown by about 90%, indicating that traffic safety issues are an urgent emphasis for improvement. This project is aimed at the common accident patterns at intersections, and develops traffic engineering improvement design examples for various accident patterns, which are applied to the improvement works for those accident patterns at intersections.

  This project proposed diversion marking and conducted trial for the prevention and control of the right turning side collision accident at intersections since 2015.Conducted analysis for the left turning side collision accident at intersections starting in 2016, and developed an improvement method. At present, the information of existing left-turn method for all types of motorcycles is being collected, to expand the improvement program.

  In the future, the traffic engineering improvement program of cross collision, rear-end collision at intersections and accidents at alley entrances will be researched further, and intersection traffic engineering examples will be collected and organized to conduct educational training. Those research outcomes will be provided to the Ministry of Transportation and Communications, the Directorate General of Highways and local road management agencies to carry out improvement analysis of the intersections prone to accidents, accurately understand accident patterns at intersections, explore the causes of accidents, and propose effective improvement programs to enhance the quality and efficiency of improvement at locations prone to accidents.

Research outcomes:

(1)Reduce the conflict between right-turning vehicles and straight-moving motorcycles by means of facilities such as diversion marking, traffic lane-based motorcycle waiting zones, and small arrow signs of motorcycle waiting zone, and cooperate with the governments of Taichung City, Keelung City and Hsinchu County to conduct trials. Taking Taichung City as an example, the number of accidents one year after the improvement was reduced by 54%, and the second year after improvement was also reduced by 42% compared with that of before the improvement.

(2)Propose the intersection setting method for the motorcycle direct left turn, use different left turn methods for special environments or traffic conditions to eliminate the left turn conflict of motorcycles and reduce accidents.

Promotion of Outcomes and Benefits:

(1)This Institute organized educational training every year from 2015 to 2017, and invites the central competent authorities, all county and municipal governments, and engineering consulting companies to promote the research results for the use by all sectors.

(2)In June, 2018, the project held joint information seminars with the 35th Improvement Plan for the Road Sections Prone to Accidents, Developing Application Plan for Road Traffic Flow and Risk Detection and Analysis Tools.

Summary of Key Research outcomes :

Example of Improving Right Turn Side Collision Design

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