Abstract
ILLUMINATED guard posts or ‘bollards’ are now gradually coming into use on all types of roads which carry fast vehicular traffic. In the Osram G.E.C. Bulletin for February, a description is given of a well-designed guard post which should prove useful not only by indicating the refuge to pedestrians, thus prompting them to cross the road at that point, but also to motorists; thus removing a frequent cause of accidents. It is a luminous pillar 4 ft. high, the light being emitted only from the side which faces the traffic. The back of the pillar is made of solid steel tube, so that in the event of a smash the damage done will be probably much less than if it were made of cast iron. The head of the bollard is arranged as a lantern with the red glass fixed around half its circumference. The red glass is generally illuminated by a sixty-watt lamp but sometimes a small auxiliary lamp is used as well so as to prevent a complete ‘black out’ if the main lamp is extinguished. Complete isolation of the bollard from the electric supply in the event of damage is easily obtained by opening a door near the ground level where the time-switch and fuses are fixed.
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Guard Posts for Road Island Refuges. Nature 131, 394 (1933). https://doi.org/10.1038/131394c0
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DOI: https://doi.org/10.1038/131394c0