You guys do realise that most of those smiley 30mph LED sign things just flash randomly/scheduled? during the day?
You're not setting them off you are just seeing them flashing.
Funny... The one I am talking about actually displays the speed below it. So unless they have magically anticipated when people will be speeding up and slowing down, then it does actually work...
Funny... The one I am talking about actually displays the speed below it. So unless they have magically anticipated when people will be speeding up and slowing down, then it does actually work...