Vehicle Classification Sampling Methodology Evaluation
Author: Wisconsin. Department of Transportation. Division of Planning & Budget
Publisher:
Published: 1978
Total Pages: 52
ISBN-13:
DOWNLOAD EBOOK →Author: Wisconsin. Department of Transportation. Division of Planning & Budget
Publisher:
Published: 1978
Total Pages: 52
ISBN-13:
DOWNLOAD EBOOK →Author: Wisconsin. Department of Transportation. Division of Planning & Budget
Publisher:
Published: 1980
Total Pages: 50
ISBN-13:
DOWNLOAD EBOOK →Author: United States. Department of Transportation
Publisher:
Published:
Total Pages: 754
ISBN-13:
DOWNLOAD EBOOK →Author: R. F. Benekohal
Publisher:
Published: 2002
Total Pages: 212
ISBN-13:
DOWNLOAD EBOOK →Nationwide surveys of departments of transportation, metropolitan planning organizations, and classification vendors/producers were conducted to determine the state of practice on equipment and methodologies used to determine truck vehicle miles traveled (VMT). The current Illinois Department of Transportation (IDOT) methodology was evaluated and it was found that it overestimated truck VMT for multi-unit trucks on all eight functional classes except on the minor urban arterials. The average overestimation was 11.5% and it varied from -10% to +44%. The current method overestimated truck VMT for single-unit trucks in five and underestimated in three functional classes. The under/over estimation ranged from -6% to +35%, but the average value was close to zero. To calculate truck VMT more accurately, this study proposed two different methods based on average truck percentage (ATP) and average section length (ASL). In the ATP method, truck VMT is calculated by multiplying the ATP for a group of roadway sections by the total VMT of that group. The ATP method should be used when the ATP and the total VMT by volume groups are available. In the ASL method, the total truck volume for the sampled sections is multiplied by the ASL. The ASL method should be used when the information required for ATP is not available or not reliable. Sample size influences the accuracy of truck VMT estimation and the decision on sample size must consider the error level that is acceptable. This study looked at the likely error for different sample sizes and recommended using 8% to 16% of the number of roadway sections. The sections should be distributed among the volume groups. Recently, IDOT collects vehicle classification data for three categories at about 10,000 sections, biennially. It is recommended to evaluate the truck VMT calculation using recent data.
Author: United States. Bureau of Public Roads
Publisher:
Published: 1956
Total Pages: 1024
ISBN-13:
DOWNLOAD EBOOK →Author: Wisconsin. Department of Transportation. Division of Planning
Publisher:
Published: 1977
Total Pages: 34
ISBN-13:
DOWNLOAD EBOOK →Author: Benjamin H. Cottrell
Publisher:
Published: 1992
Total Pages: 54
ISBN-13:
DOWNLOAD EBOOK →The Traffic Monitoring Guide (TMG) provides a method for the development of a statistically based procedure to monitor traffic characteristics such as traffic loadings. Truck weight data in particular are a major element of the pavement management process because there is a strong relationship between pavement deterioration and truck weights. Because truck weight data collected by weigh-in-motion (WIM) systems are more representative of actual traffic loadings and are more efficient than enforcement and static weight data, the use of the TMG and WIM systems together provide improved monitoring of truck weights. The objective of this research was to develop a plan for VDOT to implement a truck weight sampling procedure using the TMG and WIM systems. Four alternatives from the TMG that were based on different schemes for multiple measurements at permanent WIM sites were evaluated. A truck weight sampling plan was developed for the preferred alternative. Truck weight sample sites, data collection procedures, cost and resources estimates, data from permanent WIM sites, and data management information are included in the plan.