Ors Road Tests

I have read, with great interest, your article "If it's bad we say so" in CM May 10 1974 and agree that the reports of the tests are most useful to operators who are looking for......

Tachograph Indecision

I attended the Annual Conference of the Institute of Road Transport Engineers and listened to the answers given by Mr Furness of the DoE when he replied to questions regarding......

The Case For Retarders

The diagram of the Jacobs brake, accompanying the feature "The case for retarders" {CM May 3) gives the impression that No 3 exhaust valve is opened by No 1 exhaust valve......