ABSTRACT
In this study, to make improvements in freeway traffic flow, speed limits and ramp metering have been applied on on-ramps of the European side of 2.5 km Istanbul O1 Freeway during peak hours. Speed limits from 10 to 70 km per hour in multiplies of 10 km per hour and local ramp metering control ALINEA were applied on on-ramps of the study area. Simulation software CORSIM was used to test control results. The comparison of the results with the current condition shows that 20 km/h constant speed limit that was applied to on ramps of Beşiktaş reduce the average travel time per vehicle and the effect of shock waves on the study area. It shows as an alternative for local ramp-metering. The total travel time of vehicles on mainstream results %5 decrease.
