Say you're excessively speeding down a divided highway when a police cruiser passes you on the other side of the median and flips on the lights and sirens. Now of course you assume this is a result of your speeding but of course you can't be sure they could be trying to get to another scene down the road.
So now you realize if the cop is coming for you it will take a full 30 seconds to get to the nearest turn around and back to you, it will also for whatever brief margin put you out of view. Would it be illegal to then pull off and park behind a building in a fairly obvious attempt to hide from the police? What if in a less obvious way you just turn down a side road and keep heading that way would that be evading the officer?