Prickly, Misanthropic Pet Peeve Moment

The logic involved is really quite simple, yet it's amazing how many people don't seem to grasp how turning lanes are meant to work.  Turning lanes exist so that drivers can pull out of the flow of traffic before starting to slow down for their turns, thus having no impact on other vehicles that happen to be behind them.  Nearly every turning car I drive behind, though, slows--often significantly--before moving into the turning lane and then rarely starts that move at the earliest possible point, instead driving alongside the lane for half its length before making use of it.  Most of the time, impact on me and other drivers is much greater than it needs to be.

Oh, wait a minute.  At heart, the issue isn't an ability to grasp the logic of turning lanes; it's just that making proper use of them requires an awareness of and consideration for others.  I know enough about psychology and human nature that I should realize it's silly of me to expect such lack of self-centeredness more than a bit of the time.