Details:

Creators:
Mlynarski, Mark ; Spangler, Bryan ; Rogers, Hal
Mlynarski, Mark ; Spangler, Bryan ; Rogers, Hal Less -
Corporate Creators:
Michael Baker Jr., Inc.
Subject/TRT Terms:
[+]
Bridges
Load Factor Design
Trucks--Licenses
Trucks--Sizes--Safety Regulations
Trucks--Weight--Safety Regulations
Load Factor
Oversize Loads
Overweight Loads
Permits
Size And Weight Regulations
Trucks

Publication/ Report Number:
RC-1589
Resource Type:
Tech Report
Geographical Coverage:
Michigan
Edition:
Final report.
Corporate Publisher:
Michigan. Dept. of Transportation
NTL Classification:
NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures ; NTL-FREIGHT-Trucking Industry ; NTL-SAFETY AND SECURITY-Highway Safety ;
Abstract:
The Michigan Department of Transportation (MDOT) allows trucks that exceed their legal loads to cross

bridges if they apply and are approved for a permit. More than 30,000 permits have been processed each

year since 2002, providing a vital service to Michigan's economy. However, the permitting system must

be robust enough to ensure that the safety of the motoring public is maintained by accounting for

overload vehicles without unduly restricting commerce.

Currently, structures are placed into Overload Class by checking all service limit states as identified by

the 2005 MDOT Bridge Analysis Guide (BAG) with 2009 Interim Updates and the 2010 American

Association of State Highway and Transportation Officials (AASHTO) Manual for Bridge Evaluation (MBE)

with interims. Vehicles are placed into the Overload Class by comparing the maximum moments of the

vehicle for span lengths between 15-ft to 160-ft to the moments produced by the 20 standard overload

configurations provided by the BAG. Structures that do not pass an overload class would be marked as

restricted and require a specific analysis, increasing the turn-around time for the client and the analysis

cost incurred by MDOT.

The current software used for the analysis of the structures is a simplified solution that was developed

well over 20 years ago when more robust solutions were not feasible. With the capability of modern

computing and the availability of bridge software solutions, this research project looks at solutions for

updating the bridge analysis as well as the overall overload permit classification process.


Format:
PDF
Funding:
2010-0317
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:d6919e79f658dc5b760b2dfa30d2b5fb130b74294713f40047589a0aa5542cbb
File Type:

Supporting Files

• No Additional Files

More +