This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Contrast adjustment.Contrast adjustment.. The original can be viewed here: M-15 centerline 1917 printed cleaned.jpg: .
Licensing
Public domainPublic domainfalsefalse
This file is in the public domain because it was first published in the U.S. between 1978 and March 1, 1989, without a copyright notice, and where the copyright was not later registered.
This template must not be used to dedicate an uploader's own work to the public domain; CC0 should be used instead.
This work must carry justifications for free usability in both the United States and its country of origin.
Public domainPublic domainfalsefalse
This work has been released into the public domain by its author, Michigan Department of Transportation. This applies worldwide. In some countries this may not be legally possible; if so: Michigan Department of Transportation grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
Public domainPublic domainfalsefalse
Original upload log
This image is a derivative work of the following images: