The Electronic Reference Library (ERL) is a collection of manuals produced by the Iowa DOT. The ERL includes:
- Standard Specifications for Highway and Bridge Construction with the General Supplemental Specifications incorporated in redline and strikeout
- Supplemental Specifications
- Standard Road Plans, Standard Culvert Plans, Standard Bridge Plans, and Sign Truss Standards
- The Construction Manual
- Materials Instructional Memorandums (IMs)
- The Flagger Handbook
- Statewide Urban Design and Specifications (SUDAS)
The ERL can be viewed on a browser, and all references are hyperlinked.
Twice each year in conjunction with the April and October highway and bridge construction lettings.
Twice each year in conjunction with the April and October highway and bridge construction lettings.