Md,D.C., and NoVa won't chase past 100 due to the high volume of traffic. As far as how to? I've lost cops in everything from a roll off, to a 98 DeVille, to my wifes Jetta and the most recent (2 years ago, I've matured greatly) in a friggin base model 4 banging 60 horse power PT cruiser. It's not what you're driving/riding but how. A bunch have mentioned it but back roads are the key lots of dense woods to hide from the birds and plenty of turns. It also helps to drive ride them often and know where they will take you. I via phone navigated my wife who ran after passing a cop at 135 through some county ass roads and a good long route back to the house with out ever hitting highway except to cross it. It's stupid to run or be in a situation where you may have to and I don't recommend it ever. You can kill your self, or even worse someone innocent (that little girl on the side of the road playing with her dolly). If you don't care about others lives then think about the costs. I finally have a clean record for the first time in my 8 years of having a license, tens of thousands on tickets, repairs, court fee's and fuel, and the insurance rates are ridiculous. It's so not worth it.