1956-HKRS30-8-46_Part06 — Page 26

Speed indicators.

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or similar mechanism between the axles carrying the driving wheels it shall be deemed to be sufficient compliance with this paragraph if the brakes applied by one means of operation act directly on two driving wheels on opposite sides of the vehicle and the brakes applied by the other means of operation act directly on all other driving wheels.

(7) For the purpose of this regulation every moving shaft to which any part of the 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) Every motor vehicle shall be equipped with a braking system (which may be one of the systems required by this regula- tion) so designed and constructed that it can at all times be set so as to prevent two at least, or in the case of a vehicle with only three wheels, one of the wheels from revolving when the vehicle is not being driven or is left unattended :

Provided that this paragraph shall not apply to-

(a) motor cycles with or without sidecars attached; or (b) invalid carriages.

(9) Every motor vehicle which is fitted with a servo braking system which embodies a vacuum of pressure reservoir or reser- voirs shall be provided with a warning device so placed as to be readily visible 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.

15. (1) To every motor vehicle other than an invalid carriage for a motor cycle the cylinder capacity of the engine of which does not exceed one hundred cubic contimetres or a vehicle which it is at all times unlawful to drive at a speed exceeding twelve miles per hour, there shall be fitted an instrument so constructed and in such position as at all times readily to indicate to the driver of the vehicle within a margin of accuracy of plus or minus ten per cent if and when he is driving at a speed in excess of that specified in paragraph (2) hereof.

(2) The speed in which reference is made in paragraph (1) hereof shall be such speed as is prescribed as the maximum speed for the vehicle to which the instrument aforesaid is fitted in com- pliance with this regulation or, if no such speed is prescribed, thirty miles per hour.

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16. (1) Every motor vehicle and every trailer shall be so Wheels. constructed that the entire weight of the vehicle and of the trailer, if any.

is transmitted to the road surface by wheels or by tracks, or by a combination of wheels and tracks ;

Provided that-

(a) in the case of a track laying vehicle the parts of the track which come into contact with the road surface shall be flat and have a minimum width of half an inch. The total area of each track actually in contact with the road sur- face at any one time shall not be less than thirty-six square inches in respect of each ton of the unladen weight;

(b) a track laying motor tractor shall not draw any trailer.

(2) Every wheel of a motor vehicle other than a road roller and every wheel on a trailer when the trailer is being drawn on a road other than a trailer used solely on road repair work shall be equipped with pneumatic tyres of suitable size and design :

Provided that-

(a) this regulation shall not apply to the following motor vehicles or trailers if they are equipped with tyres of soft or clastic material of a design and type approved by the Commissioner on every wheel-

(i) a motor tractor;

(ii) a motor 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

(b) the Commissioner by permit in writing, subject to such terms and conditions and for such period as appears to him fit, may authorize the use of a motor vehicle in con- travention of this regulation.

(3) All wheels of a motor vehicle or trailer which are equipped with tyres other than pneumatic tyres shall have a rim diameter of not less than twenty-six and two-fifth inches: Provided that this regulation shall not apply to-

(a) any motor vehicle or trailer not exceeding thirty ewt, in weight unladen designed for use in works or on private