Hello Charlie,
Cool. I'd noticed that my GPS wasn't coping with this situation properly before.
Please give it a go and see if makes things better (or worse).
Are there any further turn behaviours that still need to be coded for?
Yes, I can think of two other behaviours that could be handled better: 1 - when travelling from a side road to a main road, if the angle at which the side road joins the main road becomes shallow, you don't get a turn instruction. This isn't always a problem but sometimes it's not that obvious to the human whether they should turn left or right without looking at the gps display. 2 - this is more annoying, when reaching a fork in the road where neither of the roads are a continuation of the current road, you don't always get an instruction (when the heading of the one of the exit roads is a close match to the incoming road's heading). I have tried coding for both of the scenarios but, so far, have had no success at improving the GPS's directions. Cheers, Mark