Evaluating the Impact of Road Constructions on Oversaturated Intersections: A Simulated-Based Case Study

摘要

During the road construction,the road capacity would be affected by the construction activities.Moreover,unreasonable traffic organization in construction area not only aggravate the decline of road capacity,but also greatly affect the operation of surrounding traffic.Thus,it is necessary to optimize the traffic organization with construction activities,including optimize the signal timing scheme of intersections and analyze the impact of construction area design.First,taking the construction of Metro Line 6 in Chengdu,China as the studying case,the signal timing is optimized with the minimization of vehicles delay as the optimization objective.Then,a comprehensive sensitivity analysis of the size of working area and the length of transition area is further performed.The results show that the length of construction working area should be set as short as possible,while the transition area has the least impact on traffic operation when its length is set at 50m ~ 60m.Meanwhile,with the increase of the length of the construction area,the intersection with higher green letter ratio would be less sensitive to the changes.