show the control strategy that discharge section is created before the bottleneck area to maximize bottleneck capacity. Interesting point of this paper focuses on virtual lane drop. The virtual lane drop, not physical lane reduction, could happen by a construction zone. Highway maintenance is a critical and repeatable task so the virtual drop would happen regularly. The maintenance always makes congestion traffic flow and solution of the traffic jam is using the coordinated ramp meter to discharge flow and control congestion feeding flow by VSL. In optimization, total time spentTTTS) through the highway section is minimized and total traveled distanceTTTD) is maximized to achieve the main goal, maximize bottleneck flow to capacity flow. Model predicts controlTMPC) is used to control the coordinated ramp meteringTCRM). 

3. Methods

The network of I-80 W is constructed by  SUMO and the dataset is collected from Open Street Map(OSM). The network has two input, which is the main highway stream and on-ramp,  and two output, I-80 W to San Francisco and I- 880 South and it shows on fig.\ref{270456}. PeMS dataset is used to find the flow on the highway and the station location is shown on  Fig. \ref{434937}.  Only weekday data is chosen and explore the entire April 2017 data.  The exploratory of PeMS data shows on Fig \ref{784815}.