VIDEO - Ineffective Warning Signs, What's the Harm?

video iconThis video from Minnesota's Local Road Research Board explains why specialty warning signs often requested by the public to solve a perceived problem can actually make the problem worse instead of better. In fact, it can spread the problem as people learn to ignore these signs as just more background noise.

The Ministry of Transportation and Infrastructure maintains a number of web pages explaining traffic signs and pavement markings, including the Manual of Standard Traffic Signs & Pavement Markings.

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