Expanding portable B-WIM technology.

Details

• Creators:
  Hitchcock, Wilbur A. ; Toutanji, Houssam A. ; Richardson, James ; Salama, Talat ; Callahan, Dale ; Jackson, Joshua ; Zhao, Hua
• 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.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/21552/dot_21552_DS1.pdf
• File Type:
  [PDF - 3.56 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:9512dcb44fff52c7cda2ce6eb906cb42dca1c046ccce01f7f454904fb28a9d84f52b31ada8fdcc64ef9ab3b1b22d614d5ed3c4e8ff7843b48642d391156bf31b