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Title: TRAFFIC COUNT ESTIMATES FOR SHORT-TERM TRAFFIC MONITORING SITES: SIMULATION STUDY
Accession Number: 00756104
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: 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.
Supplemental Notes: This paper appears in Transportation Research Record No. 1625, Progress in Transportation Data 1998.
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Hu, P SWright, TEsteve, TPagination: p. 26-34
Publication Date: 1998
Serial: ISBN: 0309064708
Features: Figures
(1)
; References
(3)
; Tables
(13)
TRT Terms: Uncontrolled Terms: Subject Areas: Highways; Planning and Forecasting; I72: Traffic and Transport Planning
Files: TRIS, TRB, ATRI
Created Date: Nov 5 1998 12:00AM
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