Tossing Comments
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Special Traffic Lines MARKINGS on the road can
to Promote Road LVL be made to give useful Safety information. In New York
State several types of road line are employed; a single broken indicates traffic lanes, a solid line must not be crossed save in exceptional circumstances. Double lines are of two types. Parallel solid lines are used to indicate road contractions or crossings, whilst parallel solid and broken lines serve to show where it is dangerous for traffic on the " solid " side to overtake.
Institute of Export A S showing the perturbation Demands Better I–k in business circles regard
Trade Facilities . ing the disabilities and .
embarrassment which still affect our export trade, five resolutions, urging a more energetic policy for the promotion of our exports and the need for a special organization Al4
within the Government to co-ordinate effort for this in every direction, have been passed by the Institute of Export since last September. The last was proposed by . Sir Patrick Hannon, M.P., president, and was adopted unanimously.
Particularly ProminWHAT are the most dan ent Dangers of the " gerous objects in the road Black-out , during a really black night? .
The irresponsible, darkly dressed pedestrian is, of course, mainly a danger to himself. Next, perhaps, or coupled together, are standing vehicles and barrows without lights, apparently free from police interference. The horsed vehicle constitutes a distinct risk, as the light is so far behind the motive power. When emerging from a side road, the horse, unless white, is practically invisible. We suggest that they should be required to carry reflecting discs on harness or -shafts.
A Simple Light NiTANY people are experienc Gauge for Vehicle ing difficulty in correctly Side Lamps . . . assessing the light value—or,
perhaps, it would be better to say dimmed value—of side lamps. In an effort to assist them, the Lighting Service Bureau, 2, Savoy Hill, London, W.C.2, is trying to produce a cheap gauge lamp for use by garages, etc. These -lamps will show the maximum illumination permissible, with which the other lights can be compared.
Luminous Plastic A NEW form of plastic Alleviates Black-out .1-1 material, which is lumines
Difficulties . cent, is expected to solve many black-out difficulties. It emits a greenish glow for long periods after being submitted to light for a few moments. Fragments laid in the road have been found to respond even to the lamps of passing vehicles. Its main purpose is to indicate the position of such things as garage gates, switches, stairs and other obstacles. The promoters have arranged that half the profits obtained from its sate shall be given to the National Institute for the Blind. We have tried a material of this nature behind the glass of a torch and have found it most effective. The glow lasts a considerable time and is brightened by an occasional flash.
Friction Tests on QKIDDING tests on asphalt Asphalt Road Sursurfaced sections of the faces German road system provide interesting figures concerning coefficients of friction. The surfaces tested and the coefficients obtained at a speed of 37.5 m.p.h. were : Coarse tar-asphalt concrete, 0.33; fine asphaltic concrete, not gritted,. 0.34; fine asphaltic concrete dressed with 74 lb. of chippings per sq. yd., 0.41; a similar surface with 11 lb. of chippings, 0.41; a similar surface with 15 lb. of chippings, 0.44. The result showed that the friction increased slightly with a much bigger quantity of chippings, but was not influenced by the addition of tar to the binder.