Investigating the Transferability of Calibrated Microsimulation Parameters for Operational Performance Analysis in Roundabouts

Table 5

Wiedemann 99 input parameters’ low and high values and their short description.

Factor	Parameter	Low level (−1)	High level (+1)	Description
A	Desired Speed (average) (Km/h)	20	50	Individual free flow speed.
B	Desired Speed (standard deviation)	4	7	Standard deviation of the desired speed.
C	Desired Deceleration (m/s^2)	−4.5	−1.3	The maximum deceleration drivers are willing to apply in “normal” condition.
D	Observed vehicles ahead	1	4	Influences drivers’ ability to adjust their speed/distance according to a given number of lead vehicles.
E	CC0	0.5	3	Standstill distance (m), defines the desired distance between stopped cars.
F	CC1	0.5	1.5	Headway time (s).
G	CC2	1,5	6	Following variation (m).
H	CC3	−15	−4	Threshold for the entering “following.”
I	CC5	0.1	2	Positive “following” threshold.
J	CC6	2	20	Speed dependency of oscillation.
K	CC7	0.1	0.3	Oscillation acceleration.
L	CC8	0.5	3.5	Standstill acceleration.