My daughter and I were sitting at the traffic light at Cox Creek Pkwy and Florence Blvd. facing S.W.?

A large white light streaked across the sky in front of us, low to the horizon as if it came from behind us.  It was like a dash space dash space dash.  Then it was gone.  
We have never seen anything like it.  It moved extremely fast like a shooting star, but was not steadily lit like one.  It reminded us of a missle being shot from a fighter jet.  
The strange part was how it disappeared at exact intervals almost like a sewing machine stitch.