VISSIM 5.30-05 User Manual

Example 3 - Step 3
8 t = 0 s
x = 5 m
v = 14 km/h
8
9 t = 2.7 s
x = 0 m
v = 180 km/h
9
6
6 t = 0 s
x = 5 m
v = 14 km/h
7
7 t = 2.6 s
x = 0 m
v = 180 km/h
Non-Signalized Intersections
Querverkehrsstörungen
für einen zweistreifigen Kreisverkehr
mit zweistreifiger Zufahrt
Priority rules
for a two-lane roundabout
with a two-lane entry
Spur 1
(lane 1)
Spur 2
(lane 2)
User Manual © PTV AG 2011 269
6-12
Legende (legend)
t: Zeitlücke
(min. gap time)
x: Weglücke
(min. headway)
v: max. Geschwindigkeit
(max. speed)
gestörter Querschnitt
(stop line)
störender Querschnitt
(conflict marker)
Now the priority rules for lane 2 of the entering traffic will be defined:
As with lane 1 the first few priority rules deal with all vehicle classes and in
principal work the same way. The difference for traffic from lane 2 is that both
of the roundabout lanes need to be taken into account. Thus four priority
rules are needed (instead of 3 for lane 1): Nos.6 and 7 for the outer and
Nos.8 and 9 for the inner roundabout lane. All four conflict markers relate to
the same stop line.
Please note that because of the greater distance to the conflict area the
minimum gap time for the inner roundabout lane (No.9) is slightly higher than
for the outer one.