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Federal Highway Administration / Publications / Focus / January/February 2003

Accelerating Infrastructure Innovations

Publication Number: FHWA-RD-03-014
Date: January/February 2003

In Brief

Four new publications from the long-term pavement performance (LTPP) program provide readers with information on the latest applications of LTPP data. The publication of the TechBrief, Help with Converting Pavement Smoothness Specifications (Publication No. FHWA-RD-02-112), is intended to assist highway agencies with converting the International Roughness Index (IRI) or the Profile Index (PI) to the new specifications of the PI. A second report, Pavement Smoothness Index Relationships: Final Report (Publication No. FHWA-RD-02-057), documents a series of relationships between IRI and PI that can help States in transitioning their smoothness specifications for hot-mix asphalt and portland cement concrete. The LTPP report, Study of LTPP Laboratory Resilient Modulus Test Data and Response Characteristics, Final Report, October 2002 (Publication No. FHWA-RD-02-051), provides the first comprehensive review and evaluation of the resilient modulus test data measured on pavements materials and soils recovered from the LTPP test sections. And finally, the report, Back-Calculation of Layer Parameters for LTPP Test Sections, Volume II: Layered Elastic Analysis for Flexible and Rigid Pavements, October 2002 (Publication No. FHWA-RD-01-113), looks at the methods used in back-calculating the layered elastic properties from deflection basin measurements for certain LTPP test sections and provides recommendations for these methods. All reports can be found in the LTPP pavement publication page.

A limited number of printed copies of the publications can be obtained by calling the FHWA Report Distribution Center at 301-577-0818 (fax: 301-577-1421).

Do you have a question about traffic control devices? Look no further: FHWA's new Peer-to-Peer Program on Traffic Control Devices (P2P TCD)is your one-stop shop for answers. The program is assembling a network of volunteers from across the country who possess expertise in specific areas related to traffic control devices, and who can assist local, county, regional, and State representatives with any questions they may have.

The P2P TCD program is free and easy to use. You can request assistance by contacting the program at P2P@fhwa.dot.gov or toll-free at 888-700-PEER (7337). The program coordinator will select a peer from the volunteer database who is able to answer your particular question, and the volunteer will then contact you directly. Some of the issues that P2P TCD can address include:

For information on volunteering to serve as a peer, contact the P2P TCD coordinators at 888-700-PEER (7337) or by email at P2P@fhwa.dot.gov.

Photo of an intersection using traffic control devices

Using traffic control devices is now easier with the help of FHWA's new Peer-to-Peer Program.

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Updated: 06/27/2017
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