illegal u-turn? i dont think so

i was driving South on ortonville rd (thats way past great lakes crossing) coming to the I-75 junction and i see out of my window a building with a sign that reads" north oakland county home health" i thought that would be a great place to speak to people and leave some brochures , so as i approach the junction the light is changing and no carfs are moving i decided to make a u-turn and go to the building. the police officer that was watching me felt i made an illegal u-turn. THERE WERE NO SIGNS OR MARKINGS . i told him why i turned around and that i made sure it was safe and that there were no signs and he told me it was still illegal. he changes the infraction from illegal turn which carries points and a record to just impeding traffic which is just a fine. do i say fine. or do i fight it?