Effect of Vehicle Type on the Capacity of Signalized Intersections

Evaluation of present and future traffic situation is carried out for estimating the level of service through a lot of traffic indicators (such as Saturation Flow, capacity, delay and travel time), but all these indicators are based primarily on the measurement of Passenger Car Unit (PCU) .This paper analyzes the impacts of four different types of vehicles on the capacity of signalized intersections. Data was collected at five intersections in Damascus city, and estimates of mean headways associated with four different types of vehicles, as well as passenger cars. Using the estimated headways, Passenger Car Equivalents (PCEs) were calculated, and these suggest that the impacts of these types should be given special consideration when analyzing the capacity of signalized intersections.

Assess the current status of the Railway track Case Study line Aleppo – Damascus

The Railway track is the main factor in evaluation any railway system, because it has direct effect on speed, comfort and safety of Train. As it costs about 35% of total construction of new railway, this research is important to study all elements and use available data to evaluate the studied line, and then it analyses the results to clarify the reaction between the defects. Therefore, the paper shows the priority of maintenance with less prices.