Iowa traffic control documentation requirements
What Iowa DOT asks a contractor to record about temporary traffic control, where that requirement comes from, and how strong the evidence behind it is.
What Iowa requires
Contractor's Traffic Control Technician shall "maintain a project traffic control daily diary in a format provided by the Contracting Authority." The Technician supervising installation/removal of TC devices shall be on site and document in the daily traffic control diary what was installed or removed. Submitted to the Engineer; becomes part of permanent project records.
Source: Iowa DOT ERL Section 2528On federal-aid work, 23 CFR 630 Subparts J and K apply whatever Iowa specifies, with a compliance date of December 31, 2026 — the federal floor, explained. And after an incident the questions come from the incident, not the specification: 105 published judicial matters on that.
DTCD produces this record from the drive-through itself, and names the controlling Iowa requirement on the generated PDF. Open a sample before deciding anything.
Try it on one Iowa project See pricing
Draw the closure on a map and the builder reads the route, mileposts and county from Iowa’s own public GIS, checks bridge clearance on the route and the detour, and exports a WZDx feature, a PDF or an email. It runs in the browser — nothing is submitted or stored.
Open the Iowa builder → · open the offline build · all 50 statesWhat changes at the Iowa state line
Crews rarely work one state, and the record a neighbouring DOT expects is often named differently and cited somewhere else entirely. Here is how the states bordering Iowa compare:
| State | Citation | Evidence we have |
|---|---|---|
| Illinois | Project Special Provision (BDE / Recurring Special Provision) | Binding language identified |
| Minnesota | Traffic Control Special Provision 2563 + Technical Memorandum 22-08-T-02 | Binding language identified |
| Missouri | Not yet verified | Agency source, medium confidence |
| Nebraska | Not yet verified | Agency source, high confidence |
| South Dakota | Not yet verified | Agency source, medium confidence |
| Wisconsin | Standard Spec 643.3.1(5); Construction and Materials Manual 145.9.6 | Binding language identified |
All 50 states → · The full 50-state analysis, with every citation →
Pursuant to PurposeBuilt Systems LLC's filing under Iowa Code § 68B.4 and 351 IAC 6.11(68B), use of DTCD by Iowa DOT, by contractors and consultants subject to Iowa DOT regulatory authority, and by engineering and consulting firms holding active Iowa DOT contracts is unauthorized. Whether your organization falls within the excluded class is determined under Iowa Code Chapter 68B by the Iowa Ethics & Campaign Disclosure Board or Iowa DOT, not by PurposeBuilt. The Iowa entry is included in this 50-state survey for informational completeness only and is not a solicitation of Iowa DOT or Iowa-regulated entities.