Research for AASHTO Standing Committee on Highways. Task 410. Load Rating for the Fast Act Emergency Vehicles Ev-2 and Ev-3

On December 4, 2015, the President signed into law the Fixing America's Surface Transportation Act (FAST Act) (P.L. 114-94), which includes new truck size and weight provisions that effect bridge load rating and posting requirements. Among those provisions is the exemption of emergency vehicles from meeting the nationwide Interstate truck weight limits set forth in 23 U.S.C. 127(a). The emergency vehicles exempted from these weight limits by the FAST Act can create greater load effects in certain bridges than the previous legal loads. Research needs to be undertaken to establish whether existing load factors, multiple presence factors based on likely traffic situations, and exposure intervals as specified in the AASHTO Manual for Bridge Evaluation are appropriate for the emergency vehicles; further these load factors may need to be developed or calibrated to the reliability analysis in the AASHTO Manual for Bridge Evaluation. The objective of this research is to propose modifications to the load factors for the emergency vehicles in the AASHTO Manual for Bridge Evaluation (load factor rating “LFR” and load and resistance factor rating “LRFR”). For the LRFR, the load factors shall be calibrated to the reliability analysis in the AASHTO Manual for Bridge Evaluation with appropriate modifications.

• Record URL:
  http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=4404

Language

• English

Project

• Status: Completed
• Funding: $100000
• Contract Numbers:

  Project 20-07, Task 410

• Sponsor Organizations:

  National Cooperative Highway Research Program

  Transportation Research Board
  500 Fifth Street, NW
  Washington, DC  United States  20001

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  American Association of State Highway and Transportation Officials (AASHTO)

  444 North Capitol Street, NW
  Washington, DC  United States  20001
• Project Managers:

  Dekelbab, Waseem

• Performing Organizations:

  HNTB Corporation

  New York, New York  United States 
• Principal Investigators:

  Sivakumar, Bala

• Start Date: 20180326
• Expected Completion Date: 20190325
• Actual Completion Date: 20190325

Subject/Index Terms

• TRT Terms: Bridges; Emergency vehicles; Load and resistance factor design; Load factor; Vehicle weight
• Identifier Terms: AASHTO Manual for Bridge Evaluation; Fixing America's Surface Transportation (FAST) Act
• Subject Areas: Bridges and other structures; Design; Highways;

Filing Info

• Accession Number: 01658418
• Record Type: Research project
• Source Agency: Transportation Research Board
• Contract Numbers: Project 20-07, Task 410
• Files: TRB, RIP
• Created Date: Jan 30 2018 9:57AM