18. The person in charge of the maintenance of a public road may post a sign on the road to convey the message shown in Schedule B, to prohibit a low-speed vehicle from travelling on that road.
The person in charge of the maintenance of a public road may also post a sign on the road in question to convey the message shown in Schedule C and indicate the direction in which the vehicle must travel, requiring the driver of a low-speed vehicle to travel in the direction indicated on the road sign.