Over 3.1 m one in front at night on 2 lane road.
Over 3.75 m one in front on 2 lane road daytime no night travel allowed over 3.75 m on 2 lane road.
Over 4.4 m front and rear required daylight hours only on 2 lane road.
Over 3.75 m up to 4.4 m one at the rear on 4 lane road day or night no night travel over 4.4 m.
Over 4.4 m 1 rear daylight hours only on 4 lane road.
Over 5.0 m wide Police escorts may be needed as well as pilot cars.