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January, 1973 for full brake requirements

10th November 1967
Page 87
Page 87, 10th November 1967 — January, 1973 for full brake requirements
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Which of the following most accurately describes the problem?

THE Ministry of Transport has announced that the date by which goods vehicles registered before 1968 require to meet 50 per cent service brake and 25 per cent secondary brake efficiencies will be January 1, 1973. The Construction and Use Regulations 1966 are to be amended accordingly, but the Minister has asked for comments on the proposal not later than December 8.

This means that existing (pre1968) vehicles which need to meet the interim braking efficiencies from January 1 next year will have to be brought up to the full standard of 1968 vehicles by the beginning of 1973.

Announcing the date, the Ministry stresses that modifications to artics could promote instability if the normal secondary brake (25 per cent efficiency) acts only on the driving axle of the tractive unit. To minimize this the Ministry prefers a secondary system which applies the brakes on the front axle also, or applies the brakes at the front axle of the tractive unit and the trailer axle(s).

Front-axle secondary braking is sometimes impossible to achieve with existing vehicles and in this case the Ministry sup ports the majority recommendation of the working party that the secondary brake (whether by parking brake lever or hand control valve) should actuate brakes on both the tractive unit and the semi-trailer when obtaining an overall efficiency of 25 per cent or more.

Where the existing semi-trailer brake is used for both service and secondary braking it is important, says the Ministry, that the service brake on the tractive unit should be fitted with a device which safeguards the service brake on the drawing vehicle if the trailer brakes become defective or disconnected.

The Ministry also thinks it important that the driver should have some control over the amount of braking applied to tractive unit and trailer by the secondary system.

• LONDON and PARIS are to be linked by direct Freightliner service early in 1968 when plans being discussed by BR and French Railways are completed. The train would travel via the Dover-Dunkirk train ferry five nights a week in each direction between Stratford Freightliner terminal and La Chapelle, Paris.

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Organisations: HE Ministry of Transport
Locations: PARIS, LONDON

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