VISSIM 5.30-05 User Manual

● Safety distance factor: (only
for merging conflicts) This
value is multiplied with the
normal desired safety distance
of a vehicle on the main road
to determine the minimum
headway that a vehicle from
the minor road must provide at
the moment when it is
completely inside the merging
conflict area. For each vehicle
class, a separate factor can be
entered
Non-Signalized Intersections
Similar situations but different factors
(top = 1.0, bottom = 0.5). Thus blue vehicle
can still enter while red vehicle needs to stop
● Additional stop distance (only for the minor road): Distance that moves
the (imaginery) stop line upstream of the conflict area. As a consequence,
yielding vehicles stop further away from the conflict and thus
also need to travel a longer distance until they pass the conflict area.
● Observe adjacent lanes: If this option is active, the incoming vehicles
on the minor road pay attention to the vehicles on the prioritized link
which are going to change to the conflicting lane. Please note: This
option will reduce the simulation speed.
● Anticipate routes: Enter a real number in the interval [0, 1]. This factor
describes the percentage of incoming vehicles on the minor road which
consider the routes of those approaching vehicles on the main road that
will turn at an upstream position and thus will not reach the conflict
area.
● Avoid blocking (only for crossing conflicts): Enter a rate factor in the
interval [0, 1], which describes the percentage of vehicles on the main
road which will not enter the crossing conflict area as long as they
cannot expect to clear it immediately. While these vehicles on the major
road are waiting for more room downstream of the conflict area the
vehicles on the minor road can cross the conflict area. A prioritized
vehicle in the selected percentage checks the room downstream of the
crossing conflict area. If this is less than the vehicle's length plus 0.5 m
and if the blocking vehicle is slower than 5 m/s and slower than 75% of
its desired speed (or if the obstacle is a red signal head), the prioritized
vehicle will not enter the conflict area.
User Manual © PTV AG 2011 275