AP-G84/04 Best practice in road use data collection, analysis ... - WIM

More documents

Recommendations

Info

Accessed by AR - ARRB TRANSPORT RESEARCH on 04 Feb 2005 Austroads 2004 — 62 — Best Practices in Road Use Data Collection, Analysis and Reporting The total VKTi for this region i using eight strata = ∑ VKT ij = 23,808 × 10 j= 1 3 veh-km 8 ∑ j= 1 The summation ij ij SD L = 7,249,267 veh-km The number of counting stations for each stratum ( N ij ) is calculated using Equation B1. For example, Li1 = 94,821 km and SDi1 = 29 veh for j=1 and N i 1 94, 821× 29 = × 7, 249, 267 = 14.07 or 14 stations 3 2 ( 0. 05 × 23, 808 × 10 ) This method has been developed further in Botterill and Luk (1998) by including accuracy and statistical significance requirements and relaxing the requirement on preset AADT strata. Using the original method, the number of stations required could be underestimated. 8
Accessed by AR - ARRB TRANSPORT RESEARCH on 04 Feb 2005 Austroads 2004 — 63 — Best Practices in Road Use Data Collection, Analysis and Reporting APPENDIX C – EXECUTIVE SUMMARY OF LITERATURE REVIEW REPORT (RC2050-2) Scope This Report documents a literature review of typical traffic data collection, processing, analysis and reporting practices by major road agencies in Australia, Canada, United Kingdom (UK), New Zealand and the United States (US). The emphasis of the review was on highlighting practices that differ or are in addition to the NAASRA 1982 Guide. The features of the non-Australian practices were also summarised and compared with the NAASRA Guide. Findings In some instances, the review was not able to find some specific information from the practices reviewed. For example, useful information about the frequency of traffic data collection was not available for New Zealand and the US and information about traffic data presentation was not found for New Zealand and the UK. Inconsistencies between practices Broad inconsistencies between the reviewed road agency practices were identified in regard to: the definition of the traffic information to be collected and reported; the traffic guidelines and standards on the appropriate amount of traffic counting (continuous vs. temporary counting), the duration of temporary traffic counting and the methodology of arranging traffic counter sites; vehicle classification systems, the type of equipment used and the recording of vehicle types; and, recommendations for achieving adequate levels of quality control and the required accuracy of traffic measurement. Future guidance The following findings identified as a result of this review may form a basis to resolve the current inconsistencies in traffic monitoring procedures: the development of a consistent generic framework for traffic measurement, processing and reporting that can accommodate variations in equipment technology and differing road network characteristics; the development of a systematic approach to traffic monitoring and reporting that captures changes from previous monitoring and reporting; a consistent approach to the estimation of annual average daily traffic (AADT) and other fundamental traffic measurement parameters; the development of a sound and defensible basis for traffic adjustment factors used during data processing; and, the development of principles for clear quality control procedures covering equipment calibration, quantification of equipment accuracy and the accuracy required for the estimated traffic parameters.
Page 1 and 2:
Accessed by AR - ARRB TRANSPORT RES
Page 3 and 4:
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22: Accessed by AR - ARRB TRANSPORT RES
Page 71: Accessed by AR - ARRB TRANSPORT RES
show all

AP-G84/04 Best practice in road use data collection, analysis ... - WIM

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?