When planes that aren't VTOLs take off the thrust isn't perpendicular to the runway/road - it's mostly parallel. But what can happen is if there's a crack or g

When planes that aren't VTOLs take off the thrust isn't perpendicular to the runway/road - it's mostly parallel. But what can happen is if there's a crack or gap in the road surface the wind could get under there and lift up chunks. Now you have a FOD problem for the next plane until someone can get out there and pick it up. But if the road was concrete and/or well-maintained, you're likely to be fine.