Irregardless of who gave you permission, an Garda Shiochana are the only ones (that I can know of) that can close a road and tell us that we can’t go up a certain road, not a private security company.
Van driver, I knew all the roads that were closed so I finished at 7am as I couldn’t be arsed dealing with Assholes who think I can still drive through a blocked road because I’m in a taxi. Or that I’m just trying to bring them the long way. You’ll learn soon enough.