From Longman Dictionary of Contemporary Englishhit the road/trailhit the road/trailinformalSTART DOING something to begin a journey → hit
Examples from the Corpus
hit the road/trail• Gina Coulstock, 18, stumbled, fell heavily and was knocked out when she hit the road.• Tyros get kick-started by taking shoeless jaunts around their house, back yard and neighborhood before hitting the trail.• We packed up and hit the road.• Time to hit the road again.• So next time you hit the road make sure it doesn't hit back.• Doogie allowed himself a small smile of satisfaction as Shifty-Eyes hit the road, then he turned and grabbed Pointy-Beard's tie.• Travelers will find it more comfortable and interesting to hit the road this year.• Read in studio Well it's time now to hit the road with the London Sydney car marathon. 