VISSIM 5.30-05 User Manual

1. Place the stop line on the stop
position before the yellow
box/intersection.
2. Place the conflict marker at
least one vehicle-length
downstream of the conflict
area (e.g. for cars 5-6m, for
HGVs/buses 12-18m). This is
the "storage area" for the first
vehicle downstream of the
gap.
You may want to include
separate priority rule pairs for
cars and HGVs as HGVs need
more space on the far end of
the junction.
conflict marker
(gap time = 0.0 s)
(headway ≈ (d-0.5) m)
(max. speed = 13-20 km/h)
Cars only
yellow box
stop line
(all vehicle classes)
Non-Signalized Intersections
yellow box
stop line 2
(HGV, Bus only)
User Manual © PTV AG 2011 265
5-6 m
conflict marker 2
(gap time = 0.0 s)
(headway ≈ (d-0.5) m)
(max. speed = 13-20 km/h) d conflict marker 2
(gap time = 0.0 s)
(headway ≈ (d-0.5) m)
(max. speed = 13-20 km/h)
Additional priority rule for HGv/Bus
d
d
12-18 m
3. The headway needs to cover almost the entire distance between the stop
line and the conflict marker. This is to prevent vehicles from entering the
"storage area" if another vehicle is still in it.
Make sure that the headway does not reach beyond the stop line. Otherwise
vehicles will slow down even if they could drive through straight away.
4. Use the parameter Max. speed to set a limit as to when the priority rule
should be active. For normal traffic flow, you do not want only one
vehicle in the area between stop line and conflict marker (as this would
reduce capacity enormously). Thus set Max. speed to a value between
13 and 20 km/h so that slow moving vehicles will recognize the gap
whereas faster ones will not. The higher the speed, the higher is the
acceptance of the keep clear area.