As you can see the Fig. \ref{784815} on the flow are very repeatable and is stationary time series data. Therefore, I took simply mean of each station. However, the flow doesn't sum-up with the main road and on-ramp flow compare to flow of the station that is located after the main road and on-ramp. It makes another problem that the exit station data is not reliable. However, to proof of variable speed limit and coordinate ramp controller,  I need a proper congestion flow. The ratio of entrance flow is used and assigned the ratio to the after station data to make origin and destination matrix.