Anyone that believes that photo radar is infallible,needs to learn about cosine error.Unless the photo radar vehicle is parked perfectly,the results will not be accurate.
http://www.cyberbeach.net/~mtrenout/errors.html
As far as warning signs are concerned,there is a set of guidelines set forth by the government that the people using the photo radar are required to follow.
http://www.justice.gov.ab.ca/publica...t.aspx?id=2512
One guideline that they are required to follow,but they usually ignore is:
Quote:
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Signage should inform drivers about photo radar locations:
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The quote is taken directly from the link above.After reading all of the the guidelines,it is very obvious ,that many photo radar tickets are in fact not issued in accordance with the guidelines set forth by the government.As such,those tickets are not legally issued tickets.