hit the pavement

Verb

 * 1)  To travel on foot, as on a sidewalk.
 * 2)  To travel or begin to move in an automobile or other road vehicle.
 * 3) * 1925, "Automotive Section: "Hitting it up" (advertisement)," Ottawa Citizen, 4 July (retrieved 28 Sep 2010):
 * "And when we hit the pavement, we found we had covered the last 54 miles in an hour and twenty minutes."
 * "And when we hit the pavement, we found we had covered the last 54 miles in an hour and twenty minutes."