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Author: Wisconsin. Department of Transportation. Division of Planning & Budget
Publisher:
ISBN:
Category : Motor vehicles
Languages : en
Pages : 50
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Book Description
Author: Wisconsin. Department of Transportation. Division of Planning & Budget
Publisher:
ISBN:
Category : Motor vehicles
Languages : en
Pages : 50
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
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Book Description
Author: Wisconsin. Department of Transportation. Division of Planning
Publisher:
ISBN:
Category : Choice of transportation
Languages : en
Pages : 38
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Author: Taek Mu Kwon
Publisher:
ISBN:
Category : Automatic data collection systems
Languages : en
Pages : 106
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Book Description
Presently, the Office of Transportation Data & Analysis (TDA) at the Minnesota Department of Transportation (Mn/DOT) manages 29 Vehicle Classification (VC) sites and 12 Weigh-in-Motion (WIM) sites installed on various Minnesota roadways. The data is collected 24/7 from all sites, resulting in a large amount of data. The total amount of data is expected to substantially grow with time due to the continuous accumulation of data from the present sites and future expansion of sites. Therefore, there is an urgent need to develop an efficient data management strategy for dealing with the present needs and future growth of this data. The solution proposed in this research project is to develop a centralized data warehouse from which all applications can acquire the data. The objective of this project was to develop software for creating a VC/WIM data warehouse and example applications that utilize it. This project was successfully completed by developing the software necessary to build the VC/WIM data warehouse and the application software packages that utilize the data. The main contribution of this project is that it provides a single access point for querying all of the Mn/DOT's WIM and VC data, from which many more applications can be developed without concerns of proprietary binary formats.
Author: Jerry G. Pigman
Publisher:
ISBN:
Category : Motor vehicles
Languages : en
Pages : 42
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Author: R. F. Benekohal
Publisher:
ISBN:
Category : Traffic estimation
Languages : en
Pages : 208
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Book Description
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: Wisconsin. Department of Transportation. Division of Planning & Budget
Publisher:
ISBN:
Category : Traffic surveys
Languages : en
Pages : 52
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Author: Xiaoying Hu
Publisher:
ISBN:
Category :
Languages : en
Pages : 164
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Author: M. M. Alexander
Publisher:
ISBN:
Category : Traffic surveys
Languages : en
Pages : 68
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Book Description
Author: Rick Schmoyer
Publisher:
ISBN:
Category : Motor vehicles
Languages : en
Pages :
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