Updated for the October 2025 letting.
Road design details aid designers in the development of detailed design plans for interstate and primary road construction in the State of Iowa. These details are not intended to cover all design situations. Typical sections and design forms may be modified for design situations requiring unique solutions. Section 1E-4 of the Design Manual provides guidance for modifying road design details.
| Resource | Download File |
|---|---|
| Index Sheets | Download XLSX |
| Recently Published | Download PDF |
| Typical Components Index | Download XLSX |
| Renumbered Standard Road Plans and Design Details | Download PDF |
| Revision Letter - October | Download PDF |
| Revision Letter - April | Download PDF |
| Link to Documents | Book Sections |
|---|---|
| 100s | Design and Tabulation Forms |
| 200s | Standard Notations |
| 500s | Design Detail Sheets |
| Typical Components | Typical Components |
| 2000s | Roadway Typical Sections and Drawings |
| 4000s | Roadway Ditches |
| 6000s | Curbs |
| 7000s | Paving and Reconstruction |
| 8000s | Median Crossings, Guardrail, Barriers and Earthwork |
| 9000s | Pavement Markings |