Statewide Transportation Improvement Program

The 2026-2029 Iowa Statewide Transportation Improvement Program (STIP) has been developed in conformance with the guidelines prescribed by Title 23 and Title 49, United States Code. The STIP is generated to provide the Federal Highway Administration (FHWA) and Federal Transit Administration (FTA) a listing of all projects that are candidates for federal aid from the FHWA and FTA for the four federal fiscal years (FFY) 2026-2029. FHWA and FTA approved Iowa’s 2026-2029 STIP on September 25, 2025.

Latest STIP Files

Proposed STIP Amendments

Pending and approved amendments for the current federal fiscal year are in the process of being amended in the appropriate metropolitan planning organization (MPO) or regional planning affiliations (RPA) transportation improvement program (TIP) or have recently been amended into the STIP.

Iowa's current public participation process requires that the public be notified of proposed amendments and be afforded the opportunity to comment on these proposals. After all comments concerning this proposal have been addressed, the amendment(s) will be forwarded to the Federal Highway Administration requesting approval for incorporation into the STIP. Comments concerning these proposals may be submitted to our office in writing and sent to the following location.

Comments may also be submitted via email to Zac Bitting at Zachary.bitting@iowadot.us or by phone at (515) 239-1351.

An amendment is defined in 23 CFR § 450.104 as "a revision to a long-range transportation plan, TIP or STIP that involves a major change to a project included in a metropolitan transportation plan, TIP or STIP, including the addition or deletion of a project or a major change in project cost, project/project phase initiation dates, or a major change in design concept or design scope (e.g., changing project termini or the number of through traffic lanes). Changes to projects that are included only for illustrative purposes do not require an amendment. An amendment is a revision that requires public review and comment, redemonstration of fiscal constraint, or a conformity determination (for metropolitan transportation plans and TIPs involving "nonexempt" projects in nonattainment and maintenance areas)."