The center turn lane seems to be a mystery to New England drivers.
Center turn lane is striped as follows:
http://en.wikipedia.org/wiki/Image:Citystreet.png
Center turn lane is signed as follows:
http://www.mcdot.maricopa.gov/manual...igns/R3_9b.htm
Lane is designed for drivers to turn left (off main road onto side street) without blocking traffing behind them.
Although illegal, an accepted use for these lanes (out West anyway), is to use these lanes to stop and wait for on-comming traffic to clear when turning left off the side street onto the main street.
ie, if the traffic going one direction is clear, but the other side is not, you pull into the center turn lane and wait for the other direction to clear.
This moves baffles New Englanders completely. The like to yield to you, and give dirty looks since they are too polite to use the horn.