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- Abbreviations, acronyms and initialisms
- About the DOT
- Accelerated bridge construction (ABC) project - U.S. 6 over Keg Creek
- Access management
- - Access policy (PDF)
- - Request information
- Access onto a highway - contact your Iowa DOT district office
- Accessibility statement
- Accommodations, public accommodations statement
- Acts, for the Iowa DOT
- ADA Transition Plan
- Administrative rules
- Adopt-A-Highway information
- Adopt-A-Highway Program Dangers report (PDF)
- Advertising management
- Advertising rules
- Advertising signs
- Agricultural equipment impact on roads (PDF)
- Agricultural loads, impact on roads (PDF)
- Air Transportation Industries, The Economic Values of Iowa's (PDF)
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- American Recovery and Reinvestment Act (Recovery Act) of 2009 (also known as ARRA)
- Amtrak study
- Animal debris on the road - contact your Iowa DOT district office
- Annual average daily traffic maps (click on transportation data link)
- Applets and plug-ins
- Apps, mobile
- Auctions — land and buildings sold by sealed bids
- Auctions — used equipment and vehicles
- Auto trails
- Automated horn warning system highway-railroad grade crossings
- Automated traffic enforcement (PDFs)
- Automated weather observing system (AWOS)
- Automation tools
- Avenue of the Saints
- Aviation Bulletin
- Aviation, Office of
- Aviation System Plan 2004-2024 (PDF)
