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TRAFFIC COUNT ESTIMATES FOR SHORT-TERM TRAFFIC MONITORING SITES: SIMULATION STUDY.
| 题名： | TRAFFIC COUNT ESTIMATES FOR SHORT-TERM TRAFFIC MONITORING SITES: SIMULATION STUDY. |
| 作者： | Hu-PS; Wright-T; Esteve-T |
| 关键词： | TRAFFIC-COUNTS; ESTIMATES-; ANNUAL-AVERAGE-DAILY-TRAFFIC; SHORT-TERM; MONITORING-; SIMULATIONS-; PRECISION-; VEHICLE-CLASSIFICATION |
| 摘要： | Traffic characteristics, such as the annual average daily traffic (AADT) and the AADT for each vehicle class, are essential for highway maintenance and planning. In practice, selected road segments are monitored continuously every day of the year to identify their traffic characteristics. A sample of the remaining road segments is monitored for 1 or 2 days each year, and the resulting data are adjusted (by using factors based on data collected from the continuously monitored road segments) to produce estimates of AADT characteristics. A simulation study empirically considered how the precision of an estimate from a continuously monitored site compares with the precision of an estimate from a short-term monitored site. The original estimates of traffic characteristics (i.e., AADT and AADT by vehicle class) treating the site as a continuously monitored site are on average quite close to, but smaller than, the simulated estimates treating the site as a short-term monitored site. The original estimates (continuous monitoring) appear to be more precise, on average, than the simulated estimates (short-term monitoring). This decrease in precision typically occurs for vehicle classes that account for less than 1% of the daily traffic volume, suggesting that these less-common vehicle classes could be combined to achieve reliable AADT estimates. |
| 总页数： | Transportation Research Record. 1998. (1625) pp26-34 (1 Fig., 13 Tab., 3 Ref.) |
| 报告类型： | 科技报告 |
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