yeah, it's a difficult one
as how far out she was needs to be balanced against the visibility for the junction

Oh, a cunning idea. Binky, is there a sign on the road where the woman was driving warning of the junction you pulled out of? as in, you know, the usual triangle with the black road junction on it? if so, it's a very strong argument to say that she should have known there was a junction just around the corner and should have slowed down.
( the mighty badger Aphrodite, on a bar stool, by your side, Wed 22 Jun 2011, 11:20, archived)

nope, country lanes
but she lives faiiiirly local, so she should bloody know that you can't go along them faster than 20, or 30 on an exceptionally visible bit.
( sleepybinky, Wed 22 Jun 2011, 11:43, archived)