Oh nooo, not again - just when I think have the majority of American English sussed out...here come the South Africans!!! (Only joking, I have had major trouble with some American phrases....still do!)

I'm not sure what you mean when you say, "Does it mean that he cannot be trusted to out in doggie language?" I'm sorry, I can see everyone else here going, "Duuhhh!! There she goes again!"

That aside ( shame on me, shame on me...) Digby is doing what comes naturally. It does take some time for any dog that has seen itself in the alpha position to accept that it is alright to give it up in every situation. Many are model dog's when in the house but will pull on the lead, go manic in the car and/or lunge at other people when outside.

The secret in Digby's rush to get to the corner is to make it counterproductive. The more he rushes - the longer it takes to get there. You are driving home the fact that it is up to you, you are the decision makers and, although nothing bad will happen if he doesn't accept it, nothing really good will either. As soon as he puts pressure on the lead, walks out of position or, if off lead, walks ahead of you, say, "Digby, heel." Very quietly, he has to learn how to listen to you too. As you say it walk backwards, ignore him if he puts pressure on the lead or doesn't listen - just keep walking backwards. As soon as he looks at you repeat the command with a pat on your leg to encourage him. After ten or so steps, stop. Wait for him to stop avoiding direction and then get back in position - walk two steps forward to help him out. Get him to sit and go on as normal. As soon as he gets in front again repeat the excersise.

Another good trick is to do the above and then go past the corner to another area. Play a game there...it must be a great game! Then go home without going around the usual area. Use the new area at least once a day and if you can, difficult in your situation, as the only destination for walks for two or three days. Then there is no point in anticipating the corner as the dog doesn't know where it is going.

Walk to the corner, past it or nearly to it every time you want to put the dogs' in the car - using the method above.

I'm pretty sure this is not what you were asking about, but I'm a div when it comes to phrases from other countries and I'm afraid you will have to put the road question in a different way for me to understand. I'm soooo sorry and all confidence you had in me has now failed totally, I'm sure.