As far as the blue vehicle is concerned it should be treated as a normal junction, ie don't turn unless the road is clear.It's there to stop other vehicles blocking the blue and black car from proceeding. Neither of those cars should stop in it. As for which line blue should take, the one that means it isn't driving down the box data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
Which route can the blue car take?
I'm not asking if they can stop
Sorry, edited my post:The same line you'd take at any other junction ie the one that gets you out of the path of oncoming traffic (to the right) soonest.
The shortest distance across the yellow box is directly straight ahead.
That would clear any southbound traffic (although that is stopped and cannot move forward because the way ahead isn't clear.)
What about oncoming traffic from the left?
Traffic turning right perhaps?
This is where a single carriage yellow box starts to differ from a dual carriageway box.
We need a new diagram for that data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
What about if both black and blue vehicles were turning right?
Should they go driver-to-driver?
Does the yellow box have any impact?
In the diagram, the black car has priority over the blue car, as the blue car is turning across the path of the black car.Both cars are on the minor road, with black crossing the major road and blue joining the major road.
However, just because the black car has priority over the blue car, it doesn't mean that:
a) the driver of the blue car is going to accept that and wait for the black car to go first
b) the driver of the black car isn't going cede priority and let the blue car go first
Hence proceeding with caution by both drivers is the best course of action.
Thanks, and where is that discussed in the Highway Code or legislation?
Are you saying that the Yellow box is pretty irrelevant other than providing a clear route?
It's only purpose is to prevent cars proceeding south from blocking the junction.
Look at Highway Code Rule 181 for this.