الفهرس 
English Cover
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Abstract
This study examines the effect of application of different 2Ramp Metering3 techniques on selected cloverleaf interchanges in Greater Cairo-Ring Road. Several site investigations and surveys were conducted to determine the geometric characteristics of cloverleaf interchanges of Greater Cairo-Ring Road then these interchanges were grouped based on their characteristics and one interchange was randomly selected from each group. Further site surveys were conducted to collect data about the traffic volumes of the selected interchanges. Using these data, a microsimulation model was developed using VISSIM software to assess the current conditions of traffic operation and the effect of applying different 2Ramp Metering3 techniques. The results were presented in terms of measures of performance such as level of service, time of delay and average vehicles speeds. Two 2Ramp Metering3 techniques were applied (fixed rate 2Ramp Metering3 and ALINEA algorithm 2Ramp Metering3). Each technique was applied with different scenarios and parameters