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This summary report is an archived publication and may contain dated technical, contact, and link information
Publication Number:  FHWA-HRT-16-070    Date:  December 2016
Publication Number: FHWA-HRT-16-070
Date: December 2016


FHWA LTBP Pilot Study Summary—Findings From The New Jersey Bridge Deck

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FHWA Publication No.: FHWA-HRT-16-070

FHWA Contact: Yamayra Rodriguez-Otero, HRDI-50, (202) 493-3252,


The Long-Term Bridge Performance (LTBP) Program began with a pilot study of seven bridges throughout the United States that were selected to serve as representative examples of the most common superstructure types and environmental conditions encountered within the program. The seven pilot bridges are located in California, Florida, Minnesota, New Jersey, New York, Utah, and Virginia.

To properly implement the LTBP Program, it was necessary to balance the need for high-quality research data with the following factors:

The investigation of the seven pilot bridges provided critical feedback needed to finalize the most effective approach for balancing these factors while meeting the LTBP Program objectives. The primary objectives of the pilot study were to develop effective procedures to do the following:

The experience gained and the data collected under the pilot phase have helped the LTBP Program researchers understand the following: the speed at which the data should be collected, the minimum necessary duration of traffic interruptions, specialized staffing needs, coordination of field activities for deploying nondestructive evaluation (NDE) technologies, required funds for collecting data from a large number of bridges, consistency in data collection, data interpretation, and validation of the LTBP Program Protocols.(1) Beginning in 2016, the activities and results of the studies of the seven pilot bridges will be presented in a series of reports. The reports will describe the testing and evaluation methods applied and the data collected at each bridge. The reports will also describe some preliminary analysis of the data and some efforts to compare and correlate findings from different testing methods to enhance the understanding of the data and how it relates to the bridge condition and the underlying factors that contribute to that condition.

This summary report focuses on some of the key findings that resulted from the investigation of the deck of the bridge selected for participation in the LTBP Program pilot study located in New Jersey (“New Jersey pilot bridge”). Findings related to the superstructure and substructure of the bridge will be the subject of a future LTBP Program report. Summarized findings from the testing of the other six pilot bridges will be presented in future publications.

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