COUPLED MAP TRAFFIC FLOW SIMULATOR BASED ON OPTIMAL VELOCITY FUNCTIONS

A coupled map traffic now model is introduced, based on optimal veloci ty functions. The model is simulated under open boundary conditions. E ffects of noises in velocity are investigated. The average car density increases with the noise level. The high throughput flow is realized when the noise level is sufficiently large, and power law behavior app ears in temporal spectra of density fluctuations at the same time. By introducing traffic bottlenecks, a hysteresis loop, which indicates th e emergence of traffic jams, is observed in the headway-velocity plane . Temporal spectra of density fluctuations also obey a power law in th is case: whose exponent is independent of the noise level.