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Calibration and Validation of Psychophysical Car-Following Model Using Driver’s Action Points and Perception Thresholds
| 题名： | Calibration and Validation of Psychophysical Car-Following Model Using Driver’s Action Points and Perception Thresholds |
| 正文语种： | 英文 |
| 作者： | Umair Durrani1; Chris Lee, Ph.D., P.Eng.2 |
| 作者单位： | 1Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Univ. of Windsor, Windsor, ON, Canada N9B 3P4. 2Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Windsor, Windsor, ON, Canada N9B 3P4 (corresponding author). |
| 关键词： | calibration；threshold；wiedeman；optimization；velocity；action；velociti；difference；process；point |
| 摘要： | This study develops a method of calibrating and validating the Wiedemann car-following model using vehicle trajectory data. Unlike sensitivity analysis and optimization, this method conforms to the assumptions of the original Wiedemann 99 model related to drivers’car-following behavior. Eight calibration constants (CCs) of the model were estimated using the vehicle trajectory data from a section of the US-101 freeway in Los Angeles, California. CC1 (desired time gap from lead vehicle) and CC2 (maximum change in spacing) were determined from the observed maximum and minimum spacing between the lead and following vehicles with similar speeds. CC4 and CC5 (minimum relative velocity at which the driver starts decelerating and accelerating, respectively, with short spacing of the lead vehicle or so-called action points) and CC6 (effect of spacing on these action points) were determined using a segmented linear regression model. This model provided the estimated relative velocities at which the speed of a following vehicle changed in response to a lead vehicle using constant acceleration/deceleration. It was found that the absolute values of CC4 and CC5 were not the same, which indicates that drivers are more sensitive to lead vehicles in the closing process than the opening process. CC7 was calculated as the mean difference in constant accelerations of lead and following vehicles. CC8 was calculated as the mean acceleration of all vehicles 1 s after the vehicles increased from slow speeds ( |
| 出版年： | 2019 |
| 期刊名称： | Journal of Transportation Engineering |
| 卷： | 145 |
| 期： | 9 |
| 页码： | 1-11 |
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