Analysis and control of traffic flow on elevated road near on-ramp

There are severe problems in the transportation on elevated road system in Shanghai city. On the basis of an anisotropic continuum traffic model, a ramp-effect term was introduced in the motion equation and traffic flow on the elevated road sections near the on-ramp was numerically simulated. The results show that signaling control on on-ramps is helpful for the improvement of traffic flow on the elevated roads. We also found the best timing scheme by comparing six choices of signaling period.