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The VEDENS Highway Model
VEDENS models the carriageway as discrete sections, each of which is assigned
a number of lanes. Currently up to six lanes can be modelled. Each section is
also assigned a speed limit, a physical length and a gradient. Entry and exit
slip roads, known as on- and off-ramps, can be assigned to any road section, offering
a flexible facility for modelling a wide variety of motorway-type road configurations
where there is unidirectional flow. All of these features can be viewed via an
on-screen, visual display. Vehicles entering the model are selected at random
from user-defined data, so that the effects of different proportions of vehicles
can be investigated. Vehicles are created at the beginning of the model and on
the on-ramps, according to flow rates specified for a particular simulation. The
flow rates are variable in time.
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