Yes, actually a tunnel. Off I-75, norther GA, pallet truck dumped load in southbound lane. I took detour over to US41 and there was a tunnel with a sign about a block or two ahead, "low clearance." Think it was like 7'4" or so. Oops. Saw truckers on 41, so got in line, followed them and it gave an alternate route around tunnel. Worked out fine.