4. The maximum length of any road vehicle or combination of road vehicles, load included, shall be:(1) 12.5 m for any motor vehicle where the rear overhang is 4 m or less;
(2) 14 m for any bus where the rear overhang is 4 m or less;
(3) 19 m for an articulated bus;
(4) 23 m for any combination of road vehicles consisting of a farm tractor and of 2 trailers;
(5) 23 m for any combination of road vehicles consisting of not more than 4 motorized road vehicles or chassis of motor vehicles coupled according to the saddle-back method;
(6) 23 m for any combination of road vehicles consisting of a towing vehicle and a single trailer equipped with a dolly or consisting of a towing vehicle and a single trailer having a rear overhang of 4 m or less, where the distance between the front of the load bearing section of the towing vehicle and the rear end of the trailer is 20 m or less;
(7) 23 m for any combination of road vehicles consisting of a tractor and a single semi-trailer that meet the following specifications:(a) the tractor has a wheelbase of 6.2 m or less;
(b) the tractor has an interaxle spacing of 3 m or more;
(c) the distance between the rear end of the semi-trailer, load included, and the centre of its single, tandem or triple axle is at the most 35% of the distance between the centre of that axle and the centre of the king pin;
(7.1) 25 m for any combination of road vehicles consisting of a tractor and a single semi-trailer to which is coupled only one dolly, that has the specifications referred to in subparagraph 7;
(8) 25 m for any Type B or C double train that meets the following specifications:(a) in the case of Type B, it is composed of a tractor and a semi-trailer equipped at the rear with a fifth wheel on which the front of the second semi-trailer rests;
(b) in the case of Type C, it is composed of a tractor, a semi-trailer and a double drawbar dolly, which converts the second semi-trailer into a trailer:
(c) the tractor is not provided with load space and has a wheelbase of 6.2 m or less;
(d) the tractor has an interaxle spacing of 3 m or less;
(e) the distance between the front of the first semi-trailer and the rear end of the second semi-trailer is 20 m or less;
(9) 25 m for any Type A double train that meets the following specifications:(a) it is composed of a tractor, a semi-trailer and a single drawbar dolly, which converts the second semi-trailer into a trailer;
(b) the tractor is not provided with load space and has a wheelbase of 6.2 m or less;
(c) the tractor has an interaxle spacing of 3 m or more;
(d) the distance between the front of the first semi-trailer and the rear end of the second semi-trailer is 20 m or less;
(10) 11 m for any motor vehicle not covered by subparagraphs 1 and 2;
(11) 19 m for any combination of road vehicles not covered by subparagraphs 4, 5, 6, 7, 8 and 9;
(12) 36.5 m for any combination of road vehicles on a public highway belonging to the special class described in Schedule C.