No motor vehicle shall be driven upon any street
drawing or having attached thereto more than one other vehicle, except
that a motor vehicle with semitrailer may draw in addition to said
trailer one other vehicle.
The draw bar or other connection between any
two vehicles, one of which is towing or drawing the other on a street,
shall not exceed 15 feet in length from one vehicle to the other.
Whenever such connection consists of a chain, rope or cable, there
shall be displayed upon such connection a red flag or other signal
or cloth not less than 12 inches both in length and width.