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The Mechanics of VEDENS
Once a vehicle has entered
the model, either at the beginning of the highway or via an on-ramp (entrance
slip road), its speed and position are governed by the normal laws of mechanics.
Maximum available acceleration is determined by the speed of the vehicle, its
horse power rating and a notional “resistance” factor. The resistance factor depends
on the specified maximum speed and horse power rating for the vehicle type, while
maximum braking is specified directly by the input data. Actual acceleration and
braking depend on the driver’s behaviour. Driver decisions are modelled by a driver
algorithm, a set of rules for determining whether to slow down, change lanes,
overtake, etc. Before the approach to an off-ramp (exit slip road), some vehicles
are selected to leave via the exit.
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