MOTORISTS WARNED TO LOOK OUT FOR PLANES (Mar, 1931)
MOTORISTS WARNED TO LOOK OUT FOR PLANES
Planes swooping in for a landing at the Grand Central Airport in Glendale, California, must cross a motor road at such low altitude as to menace cars. In order to prevent collisions between planes and cars, authorities at the field have erected a highway sign at this point, warning motorists of the danger. The sign resembles those used to warn motorists of their approach to railway grade crossings. This is believed to be the only point in the United States where aerial and highway traffic conflict.