That stop-sign-shaped device hanging in from the driver's line of sight is called a "wig-wag." It was a low air pressure warning flag that the driver couldn't miss. Today we use lights and buzzers.
That stop-sign-shaped device hanging in from the driver's line of sight is called a "wig-wag." It was a low air pressure warning flag that the driver couldn't miss. Today we use lights and buzzers.
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