Show winter driving darivin b hazards while the motoring public has long realized the necessity of tire chains for traction in snow or mud scientific research and tests on a frozen lake by the national safety council have revealed that chains are also vital equipment on smooth ice tests by the councils committee on winter driving hazards under direction of chairman ralph A moyer associate research professor of highway engineering at iowa state college proved that stopping distances on ice were five to eight times greater than on dry pavement equipped wita tire chains on the rear wheels alone several cars were stopped on smooth glare ice in 25 to 35 per cent less distance than when not equipped with chains and the chains added appreciably preci ably to control of the cars with chains on all four wheels stopping distances are cut 40 to 50 per cent over bare tires |