Research Article
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/s2) | −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. |
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