Vehicle detection and alarm method for detecting vehicles traveling in counter-flow along a public thoroughfare, involves using photocells arranged along one side of road to detect vehicles traveling in counter-flow along road

摘要

The method involves arranging photocells in aligned setting with predetermined separation distance along one side of a road to detect vehicles traveling in counter-flow along the road. Each photocell includes a warning device, a camera arranged on a rotating barrier, and a programmed timer.