| This paper develops an optimization model for the dynamic speed limit control to achieve speed harmonization in a network. The proposed model is able to determine the dynamic speed limit location, the appropriate reduced speed limit assigned in this location, timing to start the reduced speed limit and to recover the norm speed limit. In addition, the microscopic traffic simulation VISSIM is used to validate the proposed model. The test bed is selected on the urban freeway S Padre Island Dr (SPID) in Corpus Christi, TX, with a total length of 11.7 miles. For the selected segment on SPID with the AADT of 80,000, a dynamic speed control system is developed and calibrated in VISSIM. Based on the results of simulations, the travel time decrease by about 5%, the percentage of vehicle with high collision risk about 9%, and the emission about 11%. |
