Left turn arrows are much more complicated than expected. For example, a second left turn arrow at an intersection on Lancaster Ave. caused a sharp rise in very serious accidents until it was reversed. AAA has long suggested drivers try to avoid left hand turns and, instead, plan a route with more right hand turns for safety. Indeed, all car dealerships providing test drivings map out routes with right turns to try to avoid left turn accidents. So, Let the traffic engineers determine whether or not such an arrow is safe.