Evaluate of the impact of concrete bridge construction on vehicle traffic capacity

During the construction of concrete bridges, vehicle traffic capacity frequently experiences significant disruptions. To assess this impact, this article conducts a new comprehensive evaluation method. Initially, we calculate the equivalent speed and density of traffic on the construction section, subsequently analyze the functional relationship between these two parameters. By categorizing traffic into three distinct flow states, we compute the traffic congestion index. Furthermore, we establish a multi-lane traffic capacity model to estimate the vehicle traffic capacity during concrete bridge construction. This estimated capacity is then compared with pre-construction traffic capacity data. Experimental results reveal that the traffic capacity reduction rate and traffic flow change rate calculated using new methodology align well with actual values, thereby validating the high accuracy of new evaluation approach in assessing the impact of construction on vehicle traffic capacity.