summary of your situation:
you were changing lanes, going 90 in a 50, got ticketed and have to pay $270?

not to be a prick but, if you were a cop and saw somebody going 90 and cutting lanes in a 50 zone, wouldn't you pull them over?

the funny thing about speeding on the highway is that even if you go 90mph in a 70mph, you end up exiting the highway ramp with the guy who was going 70mph.