Road Profilographs

Some articles on profilograph, profilographs:

Profilograph
... The profilograph is a device used to measure pavement surface roughness ... In the early 20th century, Profilographs were low speed rolling devices ... Today many Profilographs are advanced high speed systems with a laserbased height sensor in combination with an inertial system that creates a large ...

Famous quotes containing the word road:

    Time is a horse that runs in the heart, a horse
    Without a rider on a road at night.
    The mind sits listening and hears it pass.
    Wallace Stevens (1879–1955)