The Implications of Converting a High-Volume Multilane Roundabout into a Turbo Roundabout

Table 5

VISSIM calibration parameters.

VISSIM parameter	Default value	Calibrated value
Average standstill distance	2 meters	1.1 meters
Additive part of the safety distance	2	1
Multiplicative part of the safety distance	3	2
Advanced merging	Checked	Unchecked
Front gap	0.5 seconds	0.1 seconds
Rear gap	0.5 seconds	0.1 seconds
Safety distance factor (Conflict areas)	1.5 meters	1.0 meters
Minimum gap time	3 seconds	2.5 seconds