Release date: April 19, 2021
About this ERL e-book download:
  • Zip filename:
  • Stand-alone, portable application
  • E-book filename: ERLApril2022.EXE
  • Size: 641 MB (large download)
Once your download is complete, extract the ERLApril2022.EXE and run the program.

The ERL e-book is a full-featured release. The same capabilities available on the ERL website are present in this download.

  • High-speed Internet, 1.5 Mbps or higher preferred.
  • Microsoft Windows®10, 8, 7, Vista, XP, 2008, 2003, 2000 or higher.
  • 256 MB RAM (Recommended: 512 MB RAM or greater).

The Setup program of ERL e-book uses Windows Installer (MSI) to perform safe modifications to your computer's configuration.

The Iowa DOT ERL includes the Standard Specifications for Highway and Bridge Construction with the General Supplemental Specifications incorporated into the Standard Specifications, showing changes made since the previous GS.

The ERL also includes the Supplemental Specifications, Materials I.M.s, Standard Road Plans, Standard Culvert Plans, Standard Bridge Plans, Sign Truss Standards, Construction Manual, Flagger's Handbook, and SUDAS Standard Specifications.

The Specifications are hypertext-based files and can be browsed by using our
e-book format.

New ERL releases

The Iowa DOT ERL is released in Oct and Oct of each year; however, corrections due to inconsistencies between ERL and printed documents may be issued at any time. Users can check the "How to install" tab to see that they have the most current version of the ERL.

Print copy

The ERL is provided as a convenience to our users. The printed version governs if there is a discrepancy between the electronic and printed versions.

Downloading individual ERL parts

Hyperlinks between the downloaded individual ERL parts will not function, such as hyperlinks between the Standard Specifications with GS-15005 and the Materials I.M.’s.  For full functionality, the entire should be downloaded.

Downloading revisions

Revisions to ERL downloads will be indicated by the Revision date. Updating the file will require downloading file again. Downloading a revised part of the ERL will not update the file that was previously downloaded.

Download entire ERL book

download Spec ERL e-book
Size: 641MB

Download ERL parts

Size: 269MB
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