Table .\ref{table2} shows performance on each case and the interesting finding is variable speed limit with naive ramp control has better performance than the bang-bang control system, which is blocked on-ramp almost entire simulation time. I would like to find the system transfer function and optimize by shortest travel time with constraining of on-ramp green light time. This simulation didn't count HOV(High Occupancy Vehicle lane) because of lack of data and using only 2/3 of real traffic data set, due to computation power. This limitation would increase the performance but I believe there is room to improve the performance by optimization.   The Result holds what Lu claims and it promises the optimization of two controllers will reduce the travel time on the congestion area.