This is an eHow article that will not only teach you how to lose the vehicle following you, but make the follower your puppet using this calculated method.
Once you're sure you're being followed (3 rights = wrong), if possible, drive towards a busy street/traffic.
Step2
As to not tip off the follower that you're on to them, pick your nose (who would do that with someone watching?).
Step3
Drive aggressively in the left lane.
Step4
When possible, approach a busy intersection red light in the right lane. (note: try to just catch the red light/maximize red light time) Just before a huge wave of traffic, turn right on red without leaving enough space for your tailer to follow.
Step5
Turn up the chase music.
Tips & Warnings
Chase music recommendations: techno, hip-hop, "It's Tricky" - Run DMC
These steps should not be used to lose the cops. If the police are following you, pull over.