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I so hope the red light cameras are approved in Pennsylvania...
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Be careful what you wish for 'cause you'll be paying too. No?
Crossing a typical two way street is about 80 feet. Two 12 ft travel lanes, two 10 ft parking lanes and two 6 ft sidewalks add up to 56 ft. The sensors a placed 6 to 8 ft back from the stop line so add 12 ft plus the length of the car at 15 ft.
You get nailed if your BACK bumper does not clear the SECOND sensor before the yellow ends.
Now if your front bumper is right at the first sensor when the light turns yellow (no chance to stop) you have to maintain an avg of 18.4 mph to make a 3 second yellow. 3 seconds is the PA state minimum. 14 mph for a 4 second yellow.
That sound easy enough but the speed goes up as the yellow changes when you haven't reached the sensor yet, but still too close to stop. Think you can mantain a 15 to 20 mph avg through every intersection? Then you've never driven in city traffic that crawls.
Get the judge to throw it out. Dream on. After taking a day off work, going to court, paying to park and spending at least half a day waiting, the judge says "Off with his head". You see PA state law says it's illegal to ENTER an intersection that the way is not clear. So everyone waits for the way to clear? GRIDLOCK. Nobody gets anywhere.
The cameras are about revenue not safety. YOUR revenue.
Oh yes, and if you do try to stop at the last second you'll get rear ended.