Category: Science

Summary: Mapping how driver look-ahead distance changes the traffic fundamental diagram and the critical density of the free-flow to jam transition.

The Nagel-Schreckenberg model is a standard minimal model of traffic, but its drivers usually react only to the immediate gap ahead. This experiment asks how giving drivers a finite look-ahead distance changes flow, critical density, and possibly even the qualitative character of the free-flow to jam transition.

The simulation sweeps maximum speed, random slow-down probability, and look-ahead distance, then measures the full fundamental diagram relating traffic flow to density. The central hypothesis is that anticipation should raise the density at which peak flow occurs and may smooth the onset of congestion when the look-ahead becomes large enough.

That produces a three-parameter phase map rather than a single traffic curve. The value lies in isolating anticipation as a control knob for both throughput and transition behavior.

Method: Nagel-Schreckenberg cellular-automaton traffic simulations sweeping maximum speed, slow-down probability, and look-ahead distance.

What is measured: Flow versus density, critical density, peak flow, dependence on look-ahead distance, and character of the free-flow to jam transition.