The public security organ can designate the route and the time for vehicles loaded with dangerous chemicals to pass or prohibit such vehicles from passing according to the requirements of the safety protection of highway tunnels and the technical conditions of highway tunnels and issue the notice to the public.
公安机关可根据公路隧道安全保护要求，结合公路隧道技术条件，指定危化品运输车辆通行线路、通行时间，或禁止危化品运输车辆通行，并向社会公告。