A - http://i.imgur.com/PGqAbaT.jpg
B - http://i.imgur.com/X0nQ3dx.jpg
I go by A but that's just what my dad taught me. If anyone can provide some information on this to clarify things that'd be great
edit:
a better example:
https://www.google.com.au/maps/place/65%2F109+Hume+Hwy,+Canl…
Please post actual Google map link. Want to see which city has got this terrific traffic sense.