knight of the road

Someone, especially a man, who spends a lot of time traveling on the road, whether for business or pleasure, or because they are homeless. My dad was a knight of the road when I was younger, traveling almost nonstop in his car to sell his goods to businesses across the country. I introduced them to Charlie, one of the many knights of the road who sleep in this area after sundown.

knight of the road

a man who frequents the roads, for example a travelling sales representative, lorry or taxi driver, or tramp.

Originally, in the mid 17th century, this phrase was ironically applied to a highwayman.