Toll plazas are one of the critical components of a roadway system. At the same time, they are among the most complex road structures, as drivers are exposed to a large amount of information and have a short amount of time to make a decision to avoid any collision. VISSIM and SSAM are used to investigate the effect of various Malaysian toll plazas design and traffic conditions on drivers’ behaviour and level of safety. The study was made a well-calibrated and validated VISSIM simulation model and several scenarios were simulated to test their efficacy for improving toll plaza safety aspects by using SSAM afterwards. From the results it was observed that the VISSIM simulation model scenarios such as implementing booths orientation and segregating lanes for different vehicle types to improve the level of service have significant safety aspects improvement regarding conflict points and lane change accidents results while using Surrogate Safety As-sessment Model (SSAM) in order to give the need for remediation of either the roadway design or the flow-control strategy.

Due to the increased number of vehicles, shopping centers and rapid growth population of Al-Mansour city, daily trips have been increasing besides generating traffic congestion in major roundabouts in the city. Those will make developing an imperial delay model in roundabouts important due to the traffic and geometric influences. Therefore, two major roundabouts have been selected in the city to be taken as a case study. Geometric features for the selected roundabouts have been measured accurately by satellite images via ArcGIS. Traffic and geometric data analysis indicate that both are significantly important on delay models. The delay time produced by SIDRA and SYNCHRO has been compared with the delay time measured from the field. A significant difference in delay for roundabouts is noticed. This difference could be attributed to the difference in driver behaviour. Ideal saturation flow is the main factor related to driver behaviour, so it adjusted to be the average of the saturation flow measured from the field (2200 vphgpl).

An algorithm system approach has been presented for extracting traffic data using video image processing. While

Prior studies showed that most evacuation contraflow designs have never been implemented. As a result, the effectiveness of these contraflow designs remains unknown. In this paper, VISSIM simulation has been used to achieve the possibility for predicting various scenarios at Kajang-Cheras highway contralane by using dynamic assignment model in order to establish best contraflow alternative path design operation. Method of Effectiveness (MOE) for dynamic assignment model (travel time, queue length, vehicles speed, delay time, fuel consumption, and CO emission) parameters has been analyzed first to assess the performance level of Contraflow operation. Seven alternative paths for the same contralane have been considered to achieve less travel time and queue length hence the reduction of fuel consumption and CO emissions that related to long queue length. Connector’s number 2 and 5 indicate the best alternative paths with the presence of the original connector (number 1) since contralane user realize that there are multi connectors to contralane ahead. Contraflow lane problems remain challenging for optimizing the best evacuation design system since the heterogeneous characteristics and no lane discipline domain on this highway at peak-hour. However, Contraflow freeway evacuation plan has been shown to be a successful remedy method to rapidly and efficiently move large numbers of vehicles during emergency situations.