Non Trunkline Federal Aid Road Program (NTFA)

The NTFA program is a cross-agency traffic data collection program created to meet the additional requirements of FHWA's Highway Performance Monitoring System (HPMS) set in 2010 which directs that each state develop and implement a Traffic Monitoring System for Highways program on all federal aid eligible roads

Through the NTFA program, MDOT is coordinating a cross agency traffic data collection program. MDOT is working with individual Agencies (Cities/Villages, Counties, Metropolitan Planning Organizations (MPO), Regional Planning Organizations (RPO), and other areas of MDOT) to identify existing traffic count programs and/or traffic data. If a traffic count program does not exist, arrangements are being made for MDOT field staff to collect the traffic data.

Goals of the NTFA Program

  • Obtain a count based Annual Average Daily Traffic (AADT) on the non-trunkline federal aid (NTFA) road segments to meet FHWA's Highway Performance Monitoring System (HPMS) requirements.
  • Provide hourly traffic data to meet the needs of the Statewide and Urban Traffic Analysis Section.
  • Provide access to NTFA traffic data.
  • Promote a comprehensive coordinated traffic collection program for Federal Aid roads statewide.

NTFA Road Network

The NTFA road network contains over 26,000 miles of road and is required to have a count based AADT reported every three or six years.

The NTFA road network has been combined by "like" traffic patterns to create 16,000 NTFA traffic segments (traff_ids) minimizing the number of traffic counts needed to meet the federal requirement.

The NTFA traffic data is collected as volume or classification and on three and six year count cycles depending upon the road type:

  • Samples and NHS: Classification, 3 year
  • Principal Arterial: Volume, 3 year
  • All other federal Aide: Volume, 6 year

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