Study on Capacity of Urban Expressway Weaving Segments

For the shortage of previous studies on urban expressway weaving segments, the capacity of them is studied using traffic simulation method. It is indicated and verified that the capacity of urban expressway weaving segments has a great relationship with the source and distribution of weaving and non-weaving flows. Subsequently, using the calibrated simulation model, capacity values of urban expressway weaving segments have been estimated, in which capacity values of weaving segments shorter than 150 m that it is not considered in the Highway Capacity Manual (HCM) 2000 are also included. In addition, it is demonstrated that the proposed model capacity estimates are consistent with field data while the HCM procedures tend to overestimate the capacity of weaving segments significantly.