原文传递
TIME PERIOD AND VEHICLE CLASS HIGHWAY ASSIGNMENT FOR AIR QUALITY CONFORMITY EVALUATION.
| 题名： | TIME PERIOD AND VEHICLE CLASS HIGHWAY ASSIGNMENT FOR AIR QUALITY CONFORMITY EVALUATION. |
| 作者： | Eash-R |
| 关键词： | AIR-QUALITY-STANDARDS; CONFORMITY-EVALUATIONS; EXHAUST-EMISSIONS; ESTIMATING-; CHICAGO-AREA-TRANSPORTATION-STUDY; TIME-INTERVALS; VEHICLE-CLASSIFICATION; HIGHWAY-ASSIGNMENT-PROCEDURES |
| 摘要： | Regions that have not attained the National Ambient Air Quality Standard for ozone must demonstrate that their transportation plans and programs conform to a state implementation plan to meet national air quality standards. Vehicle emissions are estimated by metropolitan planning organizations for these conformity evaluations, and the state of the practice is to calculate vehicle emissions from the vehicle distances traveled at different speeds. A highway assignment procedure for air quality conformity has been developed at the Chicago Area Transportation Study (CATS) to provide more detailed estimates of how vehicle distances and speeds vary by time of day and by type of vehicle. The assignment procedure prepares tables of vehicle distances traveled by speed for six classes of vehicles and eight time periods during a typical workday. The eight time period assignments more correctly depict network congestion than the peak/off-peak or average daily highway assignments previously carried out by CATS. The separate vehicle class link volumes reflect the geographic and time period distribution of trips by light- and heavy-duty vehicles. The conformity assignment procedure and the problems encountered in adapting existing highway assignment practices to allow for additional time periods and vehicle classes are outlined. Some conformity assignment results are compared with a daily average assignment to illustrate how the time period assignment procedure affects vehicle emission estimates. |
| 总页数： | Transportation Research Record. 1998. (1641) pp66-72 (8 Fig., 3 Tab., 11 Ref.) |
| 报告类型： | 科技报告 |
相关文献
- Guidance for Creating Annual On-Road Mobile Source Emission Inventories for PM2.5 Nonattainment Areas for Use in SIPs and Conformity.
- Guidance for Creating Annual On-Road Mobile Source Emission Inventories for PM2.5 Nonattainment Areas for Use in SIPs and Conformity.
- TRANSITIONAL ALTERNATIVE FUELS AND VEHICLES MODEL.
- SOAK DISTRIBUTION INPUTS TO MOBILE SOURCE EMISSIONS MODELING: MEASUREMENT AND TRANSFERABILITY.
- CONFORMITY: LONG-TERM PROGNOSES FOR SELECTED OZONE NONATTAINMENT AREAS IN CALIFORNIA.
- Foothill Transit Agency Battery Electric Bus Progress Report. Data Period Focus: Jan. 2020 through June 2020
检索历史
应用推荐
