Details:

Creators:
Hitchcock, Wilbur A. ; Toutanji, Houssam A. ; Richardson, James ; Salama, Talat ; Callahan, Dale ; ... More +
Hitchcock, Wilbur A. ; Toutanji, Houssam A. ; Richardson, James ; Salama, Talat ; Callahan, Dale ; Jackson, Joshua ; Zhao, Hua Less -
Corporate Creators:
University of Alabama at Birmingham. Dept. of Civil, Construction, and Environmental Engineering
Corporate Contributors:
University Transportation Center for Alabama
Subject/TRT Terms:
[+]
Weigh In Motion Weigh In Motion Scales Weigh Stations WIM
Publication/ Report Number:
UTCA Report Number 08204
Resource Type:
Tech Report
Geographical Coverage:
Alabama
Corporate Publisher:
University Transportation Center for Alabama
Abstract:
Advances in weigh-in-motion technology over the past 15 years have led to successful field application of a

commercial grade portable Bridge WIM system (B-WIM) in Europe. Under a previous UTCA Research

Project No. 07212, UTCA tested the state-of-the art commercially available B-WIM technology on two

interstate highway bridges. The equipment tested was developed by CESTEL, a Slovenian technology

company, and is commercially referred to as the SiWIM system. Some technical difficulties occurred during

the Project 07212 field tests; however, the SiWIM system was successfully installed, calibrated, and placed

into a data gathering mode at both sites. The objective of the research described in this report was to develop a

practical recommendation for installation of SiWIM technology at potentially multiple locations in the State of

Alabama for the primary purpose of traffic enforcement. The researchers worked with the Alabama DOT to

select a bridge for instrumentation that has the potential for an excellent accuracy classification rating. The

bridge selected is located on US Highway 78 East in Graysville, Alabama. The bridge structure consists of

three forty-two foot simply supported reinforced concrete T-beam spans with two traffic lanes in one direction.

In addition, an ALDOT-operated Bending Plate Weigh-In-Motion System (BP-WIM) is located

approximately four miles to the west also on US Highway 78. After installing the SiWiM system on the

bridge, calibration and three in-service simulated enforcement test exercises were conducted. Over one

hundred trucks were weighed by the SiWIM system and compared to their static weights. Many of the trucks

were also weighed by the BP-WIM system. The accuracy classification established for the SiWIM system

during the calibration and subsequent in-service tests varied between ±20% and ±44% of the static weight with

a confidence level of 85%. This level of accuracy is not precise enough to be used with confidence to screen

trucks for weight enforcement. The additional BP-WIM data collected during this program indicated that the

SiWIM system may be as accurate as the nearby BP-WIM system tested. Lessons learned from the work

reported here have been of benefit. In March, 2011, ALDOT personnel installed, calibrated, and operated a

newer model of the SiWIM system on a shorter span bridge, achieving B(10), C(15), AND B(10) accuracy

classification in random truck weighing for gross vehicle weight, group axles, and single axles, respectively.


Format:
PDF
Collection(s):
US Transportation Collection University Transportation Centers
Main Document Checksum:
[+]
urn:sha256:9c7646e55f31fc7dc631513b837a8230d503e37d737e0bbcd9d06db0a0535c69
Download URL:
https://rosap.ntl.bts.gov/view/dot/21552/dot_21552_DS1.pdf
File Type:

Supporting Files

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