: Data

LTPP data issues should be reported using the Data Feedback Report (DAOFR) from below. A hard copy of the form is available with directive GO-54A. The primary use of this form is to report data which appear to be incorrect, defective, suspect, or contradictory. Use of this reporting mechanism by users of the LTPP data, whether under contract to FHWA or not, is encouraged. Examples of situations when the reporting mechanism should be used include (but are not limited to):

• Absence of critical data for specific test sections
• Data that appear to be incorrect, contradictory, or otherwise suspect
• Data that are not currently collected but needed for analysis purposes
• Recommendations as to how data collection procedures may be improved