We were traveling in a 4 lane highway in Eustis, Florida. We saw two police cars along side the road, with their lights flashing-there were no other cars. I started to move to the left lane but a car was behind me in the left lane. I took my foot off the gas, and we were traveling about 30 mph. The police officer in one car took out a radar gun and zapped me. He got in his car and pulled me over, saying I had to get in the left lane, or slow down by 20 mph. He gave me a ticket citing FL Stat 316.126 (1)(b). The thing about that, there was no emergency, they were running this as a speed trap. We watched them pull over several other cars for the same offense, within 20 minutes.