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Field Validation of Speed Estimation Techniques for Air Quality Conformity Analysis.
| 题名： | Field Validation of Speed Estimation Techniques for Air Quality Conformity Analysis. |
| 作者： | Miller-J.S.; Fitch-G.M.; Dougald-L.E.; Kreissler-S.R.; Hill-D.H. |
| 关键词： | *Air-quality; *Conformity-; *Speed-estimation.;Mobile-pollutant-sources; Air-pollution-monitoring; Vehicle-air-pollution; Exhaust-emissions; Vehicle-mileage; Travel-demand; Traffic-volume; Urban-areas; Metropolitan-areas; Virginia-; Standards-compliance. |
| 摘要： | The air quality conformity analysis process requires the estimation of speeds for a horizon year on a link-by-link basis where only a few future roadway characteristics, such as forecast volume and capacity, are known. Accordingly, the Virginia Department of Transportation (VDOT) has at its disposal a variety of techniques, known as 'speed post processors' that estimate average travel speeds on each roadway link based on projected volumes from urban travel demand models. Using field data collected at 15 sites in Richmond and Charlottesville, the accuracy of three post-processing techniques was determined by comparing predicted average travel speed and measured average travel speed. On average, the mean absolute errors for the post processors were relatively similar, ranging between 8 and 12 mph. |
| 报告类型： | 科技报告 |
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