really?

This morning I was driving down Main Street in AF on my way to work.  When I was stopped at the new light on 300 West I noticed that a police car was behind me with its lights on.  I pulled over as the light turned green while trying to think of any possible reason I was being pulled over.  New registration stickers were on the license plate and I'm always really conscious of my speed.  I rolled down the window and the officer greeted me by saying, "I clocked you at 41 mph in a 30 zone two blocks back at about 100 West."  To which I asked, "Where the speed limit changes to 35?"  The officer stated, "1 block before."  ONE BLOCK BEFORE. While he took my information to write up a ticket I couldn't believe it.  The speed limit changed 10 seconds (yes, I went back and counted) after he clocked me so I would have been going 41 mph in a 35 zone.  I had tears running down my face when he came back to give me the ticket.  While I was signing it he said, "You need to slow down."  Seriously?  Did he really need to say that?  I can't believe that he ticketed me for speeding one block before the speed limit changed.  I always try to drive within 5 miles of the speed limit.  I've never been pulled over for speeding and now I have to pay almost 200 dollars. It is honestly $90 for the ticket and $100 for traffic school.  I can think of so many better ways to spend that money.   What bad luck.  I can't stop thinking about it...