File:Here, safety engineers tested the effectiveness of a guardrail.jpg
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Summary
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English: As more and more cars took to the highways in the 1930's, Michigan became a national leader in developing techniques to improve highway safety. Here, safety engineers tested the effectiveness of a guardrail. |
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| Source | https://en.wikisource.org/wiki/Page%3AMaking_Michigan_Move.pdf/20 |
| Author | Bill Kulsea and Tom Shawver |
Licensing
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This work is in the public domain because it was published in the United States between 1978 and March 1, 1989 without a copyright notice, and its copyright was not subsequently registered with the U.S. Copyright Office within 5 years. Unless its author has been dead for several years, it is copyrighted in the countries or areas that do not apply the rule of the shorter term for US works, such as Canada (50 pma), Mainland China (50 pma, not Hong Kong or Macau), Germany (70 pma), Mexico (100 pma), Switzerland (70 pma), and other countries with individual treaties. See this page for further explanation.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:01, 4 October 2021 | | 591 × 268 (96 KB) | Sp1nd01 | Uploaded a work by Bill Kulsea and Tom Shawver from https://en.wikisource.org/wiki/Page%3AMaking_Michigan_Move.pdf/20 with UploadWizard |
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