Retroreflectometer for testing the reflectivity of pavement markings and road signs.
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Previously:
https://www.homemadetools.net/forum/...894#post160120
https://www.homemadetools.net/forum/...078#post168570
https://www.homemadetools.net/forum/...614#post151702
https://www.homemadetools.net/forum/...978#post175915
https://www.homemadetools.net/forum/...617#post139631
https://www.homemadetools.net/forum/...8464#post87589
