A girl I used to work with came to work on a motorbike... at one point they closed a road on her route for nearly 3 full weeks. Every day she just went between the cones and used the road as normal (if I learned anything from her, it's that road rules are more "road suggestions" for bikers). Anyway, she never saw a workman, work vehicle, or any signs of work being done on the road... after 3 weeks, the cones and signs disappeared. Nothing actually done at any time.