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Highway Standards and District Specific Details
These drawings show the details of various construction items and are used in conjunction with the Standard Specifications. The applicable Standards are referenced on the cover sheet of the plans.
The drawing files below are the most current revisions. Navigate to District Specific Details to view specific drawings that pertain to IDOT districts.
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Individual CADD files (Microstation .dgn format) of the Highway Standards are available upon request. To submit a request, send an e-mail to DOT.HwyStds@illinois.gov
Complete Highway Standards (PDF)
- Revision 229 - effective 01/01/2026
- Revision 228 - effective 01/01/2025
- Revision 227 - effective 01/01/2024
- Revision 226 - effective 01/01/2023
- Revision 225 - effective 01/01/2022
- Revision 224 - effective 01/01/2021
- Revision 223 - effective 01/01/2020
- Revision 222 - effective 03/01/2019
- Revision 221 - effective 01/01/2019
- Revision 220 - effective 01/01/2018
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