File:America's Highways 1776–1976 - page 448a.jpg

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English: A steam roller provides motive power for a scarifier on an Indiana road in 1916. Scarifiers were used to loosen the material on the top layer of the road. The surface was then graded and compacted.
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Source https://en.wikisource.org/wiki/Page:America%27s_Highways_1776%E2%80%931976.djvu/454
Author Federal Highway Administration

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Public domain This image is a work of a United States Department of Transportation employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.

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current22:09, 25 January 2023Thumbnail for version as of 22:09, 25 January 20231,918 × 1,044 (1.51 MB)Sp1nd01Uploaded a work by Federal Highway Administration from https://en.wikisource.org/wiki/Page:America%27s_Highways_1776%E2%80%931976.djvu/454 with UploadWizard

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