It's official, the 3-foot passing law is in effect and here are some other major changes to HB101 for better bicycling in Georgia...
Motor vehicles must provide at least three feet of safe passing distance when overtaking a bicyclist
Cyclists may move to the center of the lane, i.e. take the lane, when surface obstructions, hazards or debris make traveling to the right unsafe
Cyclists must travel in the direction of traffic while using a designated bicycle lane*
Bicyclists have the right of way in a designated bicycle lane
Designated bicycle lanes must be built according to recognized national design standards
* While the new law only specifies that cyclists in bike lanes must travel in the same direction as traffic, bicycles, as vehicles, must abide by all normal vehicular laws. Wrong way travel in any traffic lane is unlawful and unsafe.
Courtesy of GeorgiaBikes.org
Here's an example of what 3 feet looks like. Image courtesy of Bicycling Club of Milledgeville.