INDOT marked the end of its first 100 years in July 2019, a milestone that celebrated the awarding of the first state highway contracts by the Indiana State Highway Commission, the predecessor to the Indiana Department of Transportation.
Since 1919, Indiana’s network of interstate highways, U.S. routes and state roads has grown to include more than 29,000 total roadway lane miles and 5,700 bridges. Road construction and maintenance techniques and technology have changed dramatically over the past century.
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Meridian Street Bridge 1919 | Indiana Avenue in Lake County, June 1925 | Wabash River U.S. 421 |
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Leveling Stone on U.S. 27 South of Portland June 1927 | Spreading Rock 1927 | 1929 Road Building |
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| Rock Asphalt Patching | Road Scraper | Road Scraper 2 |
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| Road Repairing | U.S. 40 (National Road) near Greenfield in Hancock County | U.S. 31 in St. Joseph County July 26, 1930 |
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| Road Leveling | IN HWY Comm No 403 | Spreading Concrete 2 |
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| Spreading Asphalt | Asphalt Machine | Wayne County |
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| Rolling Stone | Bridge Deck Work | Snow Removal |
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