Yes, due to the difference in ramp lengths and traffic volumes, some delays may occur on the ramps and surface streets near the interstate. However the goal is for the time to be made up on the interstate. Also, the ramp meters are built with under-pavement detectors at the top of the ramps to sense when traffic is building up toward a surface street intersection. The metering rate will be adjusted automatically to accommodate the vehicles waiting to enter the freeway. Cameras also are used to visually monitor the traffic flow.