### Road Traffic (Construction and Maintenance of Vehicles) Regulations (words omitted as spent—E.R. 2 of 2012) 《道路交通(車輛構造及保養)規例》

14. Axle loading
(1) Subject to paragraphs (2) and (3), the weight transmitted to the road surface by any one wheel of a vehicle where no other wheel is in the same line transversely shall not exceed 4.5 tonnes and the total weight so transmitted by any 2 wheels of a vehicle in line transversely shall not exceed 9 tonnes.
(2) The total weight transmitted to the road surface by any 2 wheels of a vehicle in line transversely shall not exceed 10 tonnes if each such wheel is fitted with 2 pneumatic tyres having the centre of their areas of contact with the road surface not less than 300 millimetres apart measured at right angles to the longitudinal axis of the vehicle or with a wide tyre.
(3) In the case of a vehicle having more than 2 wheels in line transversely, the total weight transmitted to the road surface by those wheels shall not exceed 11 tonnes.

15. Suspension
(1) Subject to paragraphs (5) and (6), every motor vehicle and trailer towed thereby shall be equipped with a suitable and sufficient system of suspension between each wheel and the frame of the vehicle.
(2) The system of suspension of any vehicle with 3 or more wheels shall be so designed and constructed that there is no excessive body sway.
(3) The system of suspension including any damper units therein shall be maintained in an efficient condition.
(4) For the purposes of this regulation a tyre shall not be regarded as forming part of the suspension system.
(5) Notwithstanding paragraph (1), the Commissioner may, having regard to the design and use of the vehicle, exempt any special purpose vehicle from the provisions of this regulation.
(6) This regulation shall not apply to—
(a) a motor cycle;
(b) a mobile crane;
(c) a road roller;
(d) a vehicle designed for use in works or on private premises and used on a road only in passing from one part of the works or premises to another or to works or premises in the immediate neighbourhood; and
(e) a motor tractor not exceeding 4 tonnes permitted gross vehicle weight if all unsprung wheels of such tractor are equipped with pneumatic tyres.

### Road Traffic (Construction and Maintenance of Vehicles) Regulations (words omitted as spent—E.R. 2 of 2012) 《道路交通(車輛構造及保養)規例》

16. Brakes
(1) Subject to paragraph (8), every motor vehicle shall be equipped with either an efficient braking system having 2 means of operation or 2 efficient braking systems each having a separate means of operation.
(2) For the purpose of paragraph (1), no account shall be taken of a multi-pull means of operation, unless that means, at the first application, operates an hydraulic, electric or pneumatic device which causes brakes to be applied sufficient to have a total braking efficiency of not less than the total braking efficiency required by regulation 19(1)(b) in relation to brakes as applied by a second independent means of operation.
(3) Subject to paragraph (8), all braking systems of every motor vehicle shall be so designed and constructed that notwithstanding the failure of any part (other than a fixed member or a brake shoe anchor pin) through or by means of which the force necessary to apply the brakes is transmitted there shall still be available for application by the driver brakes sufficient under the most adverse conditions to bring the vehicle to rest within a reasonable distance.
(4) Subject to paragraph (9), one at least of the means of operation required by this regulation shall be capable of causing brakes to be applied directly to all the wheels of the vehicle and the other means of operation shall be capable of causing brakes to be applied directly, and not through the transmission, to—
(a) at least one wheel of a vehicle with not more than 3 wheels; and
(b) at least half the number of wheels of a vehicle with more than 3 wheels,

and for the purpose of this paragraph a shaft leading from any differential driving gear of an axle to a driving wheel shall be deemed not to form part of the transmission.
(5) The application of one of the means of operation required under this regulation shall not affect or operate the pedal or hand lever of the other means of operation.
(6) No braking system shall be rendered ineffective by the non-rotation of the engine.
(7) For the purpose of this regulation every moving shaft to which any part of a braking system or any means of operation thereof is connected or by which it is supported shall be deemed to be part of that system.
(8) Paragraphs (1) and (3) shall not apply to a motor vehicle equipped with one efficient braking system with one means of operation if the system is a split braking system.
(9) Paragraph (4) shall not apply to engineering plant, an industrial tractor, land locomotive, land tractor, motor cycle, motor tricycle, invalid carriage, pedestrian controlled vehicle and straddle carrier.

### Road Traffic (Construction and Maintenance of Vehicles) Regulations (words omitted as spent—E.R. 2 of 2012) 《道路交通(車輛構造及保養)規例》

17. Parking brake
(1) Subject to paragraph (2), every motor vehicle shall be equipped with a braking system, which may be one of the braking systems prescribed in regulation 16, so designed and constructed that—
(a) its means of operation, whether being a multi-pull means of operation or not, is independent of the means of operation of any braking system required by regulation 19(1)(a) to have a total braking efficiency of not less than 50 per cent;
(b) its braking force, when the vehicle is not being driven or is left unattended—
(i) can at all times be maintained in operation by direct mechanical action without the intervention of any hydraulic, electric or pneumatic device; and
(ii) when so maintained in operation by direct mechanical action, is capable of holding the vehicle stationary on a gradient of at least 1 in 6.25 without the assistance of stored energy.
(2) Paragraph (1) shall not apply to a motor cycle and invalid carriage.

18. Vacuum or pressure braking systems
(1) Subject to paragraph (2) and except in the case of a motor vehicle to which paragraph (3) applies, every motor vehicle which is equipped with a braking system which embodies a vacuum or pressure reservoir or reservoirs shall be provided with a warning device so placed as to be readily visible or audible to the driver of the vehicle when in the driving seat in order to indicate any impending failure or deficiency in the vacuum or pressure system.
(2) In the case of a vehicle the permitted gross vehicle weight of which does not exceed 5.5 tonnes which is propelled by an internal combustion engine and is equipped with a braking system embodying a vacuum reservoir or reservoirs, the vacuum therein being derived directly from the induction system of the engine, it shall not be necessary to provide a warning device in accordance with paragraph (1) if, in the event of a failure or deficiency in the vacuum system, the brakes of that braking system are sufficient to provide a braking efficiency of 50 per cent.
(3) A motor vehicle which is equipped with a braking system which uses compressed air only as its means of operation shall be fitted with a suitable air pressure gauge or gauges and a suitable audible warning device to indicate low air pressure. (L.N. 203 of 1990)
(4) Where a motor vehicle to which paragraph (3) applies was manufactured on or before 1 January 1990 or was first registered on or before 1 July 1990, it shall be sufficient compliance with paragraph (3) if it is fitted with a suitable air pressure gauge or gauges. (L.N. 203 of 1990)