Another scary driving moment

Was driving towards Palm Springs airport to take Abby, was at a stop light waiting to turn left.  Light turns green and I drive left but into the oncoming lane on the left instead of over to the right.  Abby screams and I realize what just happened.  Luckily there were only two stopped cars and no oncoming cars so I just did a u-turn and corrected the situation.  I laughed it off, kinda like a OOPS but Abby's all  It's not funny!  And I said, my night vision is not that good.  But looking back, I shoulda seen the middle divider or at least known it was there and driven correctly.  I wonder if this was a brain fart or an innocent vision thing.   I hope I don't have a car accident.