CLOSE OVERLAY
Project Details
STATUS

In-Progress

START DATE

02/21/17

END DATE

06/30/18

FOCUS AREAS

Infrastructure

RESEARCH CENTERS InTrans, BEC
SPONSORS

National Academy of Sciences

Researchers
Principal Investigator
Başak Aldemir Bektaş

Associate Scientist, CTRE

About the research

The management of the aging bridge population in the United States is a multi-billion dollar public liability.

National focus in the areas of bridge preservation has been geared toward condition extension methods. These conditioned focused efforts are important, but if bridges are found to be replaced for reasons other than condition, then bridge managers should focus additional research, practice, and policy on addressing these issues. Research that clearly identifies what drivers we are trying to preserve for holds the potential to extend the service lives of bridges and save billions of taxpayer dollars.

The initial research activity will mine many years of National Bridge Inventory (NBI) data to characterize various attributes of bridges in their last year of NBI reporting prior to being decommissioned.

See the research needs statement at the Transportation Research Board’s website for additional information.

Project Details
STATUS

In-Progress

START DATE

04/09/15

END DATE

04/08/17

RESEARCH CENTERS InTrans, CMAT
SPONSORS

American Association of State Highway and Transportation Officials (AASHTO)
National Academy of Sciences
National Cooperative Highway Research Program (NCHRP)

Researchers
Principal Investigator
Doug Gransberg

Affiliate Researcher

Co-Principal Investigator
Hyung Seok "David" Jeong

Affiliate Researcher

About the research

The objectives of this research are to (a) quantify the costs and benefits of a formal partnering process and (b) prepare a recommended AASHTO Partnering Handbook, Second Edition.

Visit the AASHTO Partnering Handbook, Second Edition project website at the Transportation Research Board for more information.

Project Details
STATUS

Completed

START DATE

04/13/09

END DATE

03/31/10

RESEARCH CENTERS InTrans, CP Tech Center, CTRE
SPONSORS

National Academy of Sciences

Researchers
Principal Investigator
Peter Taylor

Director, CP Tech Center

Co-Principal Investigator
Shashi Nambisan

Transportation Research Engineer

About the research

Increased concern for environment and worker safety requires that alternatives be found to avoid working with hazardous materials. An alternative for the calibration method using mercury in Section 4 of AASHTO T 153/ASTM C 204 is needed. The objective of this project was to add an alternative method to AASHTO T 153. The new method must not use hazardous materials and be safer to use than the current method while maintaining the accuracy and precision of the current method.

The researchers concluded that mechanical devices can be use to measure and calibrate Blaine cells with sufficient precision to allow users to conduct measurements without the need to handle mercury, and proposed changes to AASHTO Test Method T 153 to allow use of physical measurements. The report was forwarded to AASHTO staff to make it available to the chair and members of the AASHTO Highway Subcommittee on Materials, and to consider adoption of the recommended changes.

Project Details
STATUS

In-Progress

START DATE

12/15/06

END DATE

12/14/07

RESEARCH CENTERS InTrans, CTRE
SPONSORS

National Academy of Sciences

Researchers
Principal Investigator
Michael LaViolette

Bridge Engineer Specialist

About the research

The objectives are to review and discuss the state-of-the-practice of incremental launching of bridges around the world and to identify the critical issues for consideration in design and construction of bridges using incremental launching. A strategic plan for increasing the use of incremental launching in the U.S. will also be developed.

TOP