Research on Speed-up of Operating Freeways Based on Adaptive Evaluation of Design Indicators
[Purposes]In order to evaluate the rationality of existing speed limits on freeways,it is neces-sary to evaluate their adaptability to actual traffic conditions based on design indicators.[Methods]Based on the adaptability evaluation method of design index and combined with traffic accident data,a systematic study on the original speed limit value of a highway is carried out.The adaptability of the lim-ited speed value to actual traffic flow was analyzed,and the recommended speed limit value was deter-mined.[Findings]The speed limit of this freeway train can be increased from the current speed limit of 100 km/h to 120 km/h.After more than 2 years of operation,the expressway has not experienced any traf-fic accidents due to the increase in speed limit,indicating that the practical application effect of this method is good.[Conclusions]This method can provide reference for the reasonable evaluation and opti-mization of speed limits for operating freeways.
speed limitfreewaydesign index adaptability evaluation methodtraffic safety
NETL
NSTL
万方数据
