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14th May 1954, Page 58
14th May 1954
Page 58
Page 58, 14th May 1954 — Search for Greater Efficiency
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Safety and Highway Lighting : Feather-bedding the Bus Passenger : Co-ownership as an Incentive : Where Traders' Vehicles Score Scope for Transport Research ACTION by national and local authorities to remedy traffic congestion was imperative, Lord Merrivale of Walkhampton, president, told the Institute of Traffic Administration's conference at Southport, last week-end. He commended the Manchester Centre for their research into traffic problems and the Preston Centre for their co-operation with the Preston police on road-safety matters.

Good highway lighting, said Lord Merrivale, was of vitalimportance in improving safety at night. Road illumination should enable a driver to have perfect vision on the carriageway and a clear view of the footpath without use of the headlamps.

The most effective form he had ever seen was on part of the dual road on the western exit from Paris. This was provided by 250-W, mercury-discharge bulbs which had an inner coating of a fluorescent powder which changed the blue-green colour of the light to practically white. The bulbs, he said, were screwed into an I8-in.-diameter aluminium shell which was fitted with two adjustable mirrors made of refined alloy, the secret of the method's success lying principally in the type of bulb and the shape and inclination of the mirrors.

The lamps were fitted in pairs to pillars at a height of 43 ft. and located at intervals of 164 ft. on the central

reservation between the two roads. Main transformers for the electrical supply were connected in series, and were of a moving-coil regulator type in order to give a fairly constant intensity despite voltage fluctuations.


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