U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
|This report is an archived publication and may contain dated technical, contact, and link information|
Publication Number: FHWA-HRT-06-132
Date: December 2006
The FWD tow vehicle should be warmed to achieve an interior temperature of at least 5 °C (40 °F) before turning on the signal processor or data collection computer.
For testing in ambient temperatures at or below -10 °C (15 °F), the standard hydraulic fluid should be replaced with a lighter-weight synthetic fluid or other oils as recommended by the manufacturer. Some oils may not be appropriate for warm-weather operations.
Topics: research, infrastructure, pavements and materials
Keywords: research, infrastructure, pavements and materials, Deflection measurement, falling weight deflectometer, LTPP
TRT Terms: research, facilities, transportation, highway facilities, roads, parts of roads, pavements