The red light signal is on the ramp and the upstream speed limit slows down to 18 m/s when the inspected area is slow down more than 18 m/s(Bang-Bang control). This case has 9.41s for a median travel time and 9.82 mph for a median speed. The Fig.\ref{361248} shows the bang-bang control and speed limit control with naive ramp metering have the similar trend on the time series. The Fig.\ref{980288} also, shows it's very similar. However, the bang-bang control blocks the on-ramp almost of entire simulation time and it wouldn't make sense in real life. Moreover, the performance is not that different between applying ramp metering only control.