Nav/Traffic symbol question
It looks like two letter "A"s super imposed on each other in black with a thin white outline. There is also a small number in a circle on the top "A". Seems to appear near overpasses. In the small circle I have seen the number 3 and 5.
Have found nothing on it in the manual. These symbols come and go from time to time. Thought it represented an accident but I have never seen an accident near the symbol.



