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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, Standard Road Plans, Standard Culvert Plans, Construction Manual, Materials Instructional Memorandums (I.M.s), a link to the Flagger Training Website, ITS Standards, and the SUDAS Standard Specifications. The Specifications are hypertext-based files and can be browsed by any web browser. Autocad and Microstation Figures are included with the SUDAS Standard Specifications.