You can reduce the number of people that will tailgate you with the following strategies:
1 - Don’t just drive the limit. Drive the road. If most of the other traffic on the road is going faster than you, then you are driving too slow.
2 - Stay right unless passing. If you are going as fast as most of the other traffic, then just stay in the right hand lane and avoid the fast lane.
3 - Give people room to get around you. That means don’t drive right next to cars in the adjacent lane(s); stay far enough ahead or behind them so that faster cars can change lanes in front of or behind you.
Unfortunately, the other posters are right about driving in Atlanta… GA is blessed with a higher than average testosterone poisoning quotient, which leads to symptoms like tailgaiting and other road rudeness.
If someone is tailgaiting you, and you want them off your tail, try the following tactics, in order:
1 - Wave them around. If you aren’t in the left lane, then stick your left arm out the driver’s window and wave them around. If you are on a two-lane undivided highway, make sure it’s safe for them to pass before doing this.
2 - If you are on a freeway, or other multilane divided highway, merge right so they can pass. (Unless you’re already on the right, of course.)
3 - Slow down gradually. This tends to anger people more, so I don’t recommend it unless it is your intention to annoy someone. And don’t do it if there’s no room for them to pass you on a two-lane undivided highway.
4 - Even more annoying: spritz your windshield. Your windshield washer fluid will get on their windshield as well. This is especially effective when traveling into the sun when it is low in the sky.
5 - Get a bumper sticker that says “If you tailgate me, I will flick a booger on your windshield.” (I actually saw this on a car yesterday.) 
