function: Online simulation and evaluation by SUMO of an express way with on-ramp 1. traffic context is fixed 2. able to turn on and off a ramp-metering feed back control 'ALINEA' 3. able to plot: speed-contour plot, fundamental diagram, demand plot 4. able to turn on or off adaptive smooth method to have a closer look of congestion wave propagation. need some time to run. 5. able to calculate free flow capacity and queue discharge rate 6. able to calculate capacity drop