| 摘要 |
An attachment for a standard traffic light assembly functioning as a precise, real-time, numerically displayed countdown warning device indicating the exact moment of change from the green to the amber signal. Mounted and fastened to the existing steel frame of the traffic light assembly, the device will be parallel and visually in-line with the green signal light. A lighted frontal viewing surface will display in sequence the numerals five (5) through one (1) in descending order for a numbered countdown of luminous green light as follows: 5....4....3....2....1. A blank screen will then coincide simultaneously with the lighting of the amber signal. The above mentioned components of the countdwon warning device will ensure that the digital switching is always activated precisely when 5 seconds remain in the duration of the green signal of the host traffic light and deactivated simultaneously with the lighting of host traffic light's amber signal.
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