The driver automatic alarm decision-making optimization model needs to take into account during traffic accidents factors of driver stimulation and task clutter as well as processes of coordinate reaction behavior In the past, a simulation step was chosen with 1 second. This ignored the influence of lagging driver automatic alarm decision-making response time, which impacts simulation accuracy of driver automatic alarm behavior. Meanwhile, on account of imprecision of clock scanning, the ability of driver's behavior simulation model is weakened in a dynamic traffic accident scene. And it brought on the results which only considered macroscopic affect information in traffic accidents and influence of relatively static road signs in the past. If we want to raise the simulation precision of driver automatic alarm behavior, we must reduce clock scanning time.
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