Transportation Improvement Program (TIP)

What is the TIP?

The Transportation Improvement Program (TIP) is a financially constrained four-year program for addressing short-term transportation priorities that are consistent with the area’s long-range metropolitan transportation plan (MTP). The TIP allocates the limited transportation resources among the various capital and operating needs of the area, based on locally developed priorities

What role does the MPO play?

The TIP is developed and approved by the MPO and is included, without modification, in the Statewide Transportation Improvement Program (STIP) following approval by the Governor. The TIP can be modified at any time subject to approval of the MPO technical and policy committees.

What Gulf Coast roads are eligible?

Any functionally classified road within the urbanized area is eligible for Federal funding. Current Function Classification Maps are listed on this page. Click each image to view a larger map.

Functional class map

How is the TIP updated, amended or modified?

Administrative modification – all revisions that are not amendments, where there is no distortion of fiscal constraint and the availability of funds is assured.

These modifications usually involve, but are not limited to:

  • Minor description or termini changes (minor changes are those which do not impact travel demand models or an approved air quality analysis such as addition of shoulders, bike lanes or sidewalks, intersection modifications, facility maintenance, etc.).
  • Shifting funds between federal fiscal years of the approved TIP provided fiscal constraint is maintained. Shifting funds in grouped projects within the TIP, provided fiscal constrain is maintained.
  • Changing the federal funding source program (e.g., changing the source of federal funds from HSIP to
  • STP provided fiscal constraint is maintained).
  • Splitting an entry already in the TIP, or breaking out another project or phase from the original entry. The intent is not to add a new project but to facilitate project development by phasing implementation.
  • Removing a project reported as obligated or completed.
  • Correction for omissions or errors in an approved project provided the action does not affect another agency’s project or impact the travel demand model or approved air quality analysis.
  • Financial changes in a project’s total programmed amount of federal funds as identified in the sliding scale listed below.

(GRPC may increase Surface Transportation Program (STP) funds allocated to a project by 15% with the approval of the Executive Director.)

To process administrative modifications, GRPC staff will:

  • Prepare and publish an updated TIP project listing on the MPO website.
  • Notify the Mississippi Department of Transportation and request that modifications be included in the Statewide Transportation Improvement Program.
  • Prepare a summary of administrative modification activity to present to the Transportation Policy Committee at the quarterly meeting

Modifications do not require public or TPC committee review or approval. GRPC retains the right to require a formal amendment for any proposed modification to the TIP that, in the opinion of staff, requires public review and the formal endorsement of the Transportation Policy Committee.

Amendments are proposed changes that meet one or more of the following criteria:

  • Addition or deletion of any project (except as noted in the Administrative Modifications section)
  • Substantial changes to the scope of a project (e.g., changing the number of through traffic lanes, significant project termini changes, removal of bicycle/pedestrian elements, etc.)
  • Financial changes in a project’s total programmed amount of federal funds greater than that listed in the sliding scale found in the Administrative Modification section
  • Changes to any project that would affect the approved air quality analysis or travel demand model. Formal amendments are processed on an as needed basis at the quarterly MPO meetings

Amendments will be evaluated based on TIP project selection guidelines found in the TIP Handbook. Amendments will be presented to the Technical Coordinating Committee for consideration after a 10 day public review period. All comments and recommendations will be forward to the Transportation Policy Committee for consideration. Amendments that affect an approved air quality analysis for the region will also be subject to review and approval by state and federal agencies.