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Promoting uniformity of urban design and construction across Iowa.

What's New

2018 Edition Revisions

The 2018 Edition revision packets to the SUDAS Design Manual and SUDAS Standard Specifications have been distributed. If you did not receive your packet(s) or have an update to your contact information, quantity, etc., please contact Beth Richards (; 515-294-2869). The website has been updated to the 2018 Edition! The major Design Manual changes included updated information on binder selection for northern tiers of counties, intermediate and base layers, and for overlays; added information on joint durability (C-SUD) mixes to match recent research and clarified information on admixtures; added new sections for jointing of PCC roundabouts, automated machine guidance, and overlays; added more detailed design information on buffered and separated bicycle lanes; and various other revisions to generally update the manual. The major Specifications changes included added specifications requirements for use of stringless paving equipment to provide information to the contractor and the equipment requirements, as well as the construction staking; revised various sections to address a new law affecting bidder qualifications; added the use of laser guided screeds and concrete pumping; added stringless paving; added intermediate aggregate; expanded mix design to add C-SUD mixes; developed new sections for PCC and HMA overlays; updated information on partial depth patches and added a subsection and figure on dowel bar retrofit for PCC pavements; developed a new section to provide standard temporary traffic control layouts, including figures; and various other revisions to generally update the manual. To see the full revision packets, check out the Latest Revisions page.


The Iowa Legislature adopted and Governor Branstad signed into law Senate File 438 on April 13, 2017. The bill was effective for any public improvement contract entered into on or after that date. See the attached document for detailed information, the link to the actual bill, and the proposed changes to the SUDAS Specifications.

Temporary Traffic Control

SUDAS staff developed an updated Temporary Traffic Control Handbook through an Iowa Highway Reserach Board project. One copy of the handbook was distributed to each county office and each city office with a population over 1,000 people. If you would like to request additional copies, please complete this form. Click here for an electronic version of the handbook. The handbook is also used in Iowa LTAP trainings.

SUDAS Manuals

PLEASE remember the SUDAS program consists of two manuals - the Design Manual and the Standard Specifications. If you have both manuals in your office, please make sure you carefully read anything we mail to you. The binders for the two manuals look very similar or might be the same (depending on when you purchased your SUDAS Standard Specifications). This does not mean it's the same manual!!! If you have questions about your manuals, please compare the contents of the manual to this website or call us for clarification.

SUDAS mail lists

If you own copies of the SUDAS manuals, please make sure to let us know when your address or point of contact might change. Since we issue annual revisions for free to current manual holders, we rely on you to let us know when something changes.