Evaluation of Load Ratings for Alaska Legal Loads Exempted by Federal Law

In Alaska, the gross vehicle weight (GVW) is not specified. Alaska Department of Transportation and Public Facilities (DOT&PF) is working with Modjeski and Masters to evaluate how this could affect the bridge inventory. The study includes the review of weigh-in-motion (WIM) data, overload permit history, current bridge inventory capacity, plus AASHTO and National Bridge Inspection Standards (NBIS) requirements. The research study deliverables include (1) development of a notional load, rating formula, recommended maximum GVW, and live load factors to address loads on designated Alaska Interstate routes which conform to state legal limits but exceed the 80,000-pound Interstate GVW limit, (2) analysis of vehicles from legal loads up to 125% of state legal loads, and (3) recommended reduced inspection frequencies according to the new NBIS requirements for any affected bridges.

Language

• English

Project

• Status: Active
• Funding: $450,000.00
• Contract Numbers:

  HFHWY00311

  4000(225)

• Sponsor Organizations:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Managing Organizations:

  Alaska Department of Transportation and Public Facilities

  Research & Technology Transfer
  2301 Peger Road
  Fairbanks, AK  United States  99709-5399
• Project Managers:

  DeMattio, Cristina

  White, Janelle

• Performing Organizations:

  Modjeski and Masters, Incorporated

  Mechanicsburg, PA  United States  17050
• Start Date: 20230701
• Expected Completion Date: 20250630
• Actual Completion Date: 0

Subject/Index Terms

• TRT Terms: Bridges; Inspection; Live loads; Load factor; Vehicle weight; Weigh in motion
• Identifier Terms: National Bridge Inspection Standards
• Geographic Terms: Alaska
• Subject Areas: Bridges and other structures; Highways; Motor Carriers;

Filing Info

• Accession Number: 01947027
• Record Type: Research project
• Source Agency: Alaska Department of Transportation and Public Facilities
• Contract Numbers: HFHWY00311, 4000(225)
• Files: RIP, STATEDOT
• Created Date: Feb 21 2025 9:37PM