About the MAP-21 Data Program

The Georgia MAP-21 program is a unique collaborative effort bringing together the Georgia Department of Transportation (GDOT), the University of Georgia's Carl Vinson Institute of Government ITOS Division (ITOS), and the Georgia Association of Regional Commissions (GARC).  The work conducted under this program will help meet the state's Federal reporting requirements under the new MAP-21 initiative.  The Regional Commissions that make up the GARC will work with their constituent county and city governments to verify, and in some cases collect, 7 road characteristic data elements where available in local data.  ITOS will support these efforts by GARC through two-way data dissemination between GDOT and GARC and will perform QA/QC processes.

This program will focus only on local roads, meaning no collection is required for State Highways. The 7 data elements needed to support MAP-21 reporting are:

       Data Elements Requiring Verification

  • Ownership - What Jurisdiction does the road belong to. GDOT's data is verified against local data where available
  • Operation - Is the road One-Way, Two-Way, or does it have Reversable lanes.  GDOT's data is verified against local data where available
  • Number of Lanes - Number of through lanes on the roadway. GDOT's data is verified against local data where available
  • Surface Type - Is the road paved or unpaved.  GDOT's data is verified against local data where available
  • Median Type - Is the median grass, soil, or concrete. GDOT's data is verified against local data where available

      Data Elements to be collected

  • Traffic Control Devices - What type of device controls the intersection; stop sign, traffic light, yield.  GDOT's data is verified against local data where available.  This data element is slightly different in that there will also be an effort to collect this information if local sources do not have it.
  • Road Name - The name of the road for all local roads.  This data element will be collected directly from local sources.