6. Take Shortcuts & Cut Corners
The cops love sticking to the roads when they're chasing you, so if you find yourself unable to shake Johnny Law, cut corners. Cutting across pavements, going the wrong way down the road and into oncoming traffic are both great methods of building up a gap between you and the police. If you happen to find yourself stuck on a Freeway, you'll often find broken parts of the side railings or barriers, usually big enough to get a car through. There's always usually a ramp disguised as construction work around; hit one of these right and you'll be able to shake off Los Santos' finest quicker than Trevor can get kicked off the golf course. This method won't do much by itself, but combine it with using the alleyways and you're golden.