When a permittee or user moves a permit vehicle that exceeds 9 feet in width on highways in the State, the permittee shall display, on the front and rear of the vehicle, wide load or oversize load signs conforming to the specifications in §B of this regulation. Specifications. Permit Vehicle. A permit vehicle shall display the words “wide load” or “oversize load” in black letters not less than 10 inches high, with a brush stroke not less than 1 5/8 inches wide. The letters shall appear on a yellow background, 18 inches high and 7 feet wide. Escort Vehicle. An escort vehicle shall display a “wide load” or “oversize load” sign either on the roof of the vehicle or on the front and rear of the vehicle that is at least 5 feet wide and 12 inches high with letters 8 inches high. The sign shall be clearly visible to traffic approaching the escort vehicle. While the permit vehicle is moving on any highway in the State, the signing requirements of §§A and B of this regulation apply regardless of the permit vehicle's state of origin. Placement of signs required by this regulation may not interfere with the visibility of brake lights, turn signals, or any other required lamps or signals on the vehicle.