Okay....So Black line, is lane 1, this is where everyone uses to get off, which is correctly so,
However at peak time, this get back logged about a mile down the motorway.
As you can see there are 2 lanes at the junction.
90% of the time, it's only the 1st lane at the junction that is causing the traffic jam, as most commuters want to take the 1st exit at the roundabout. Where as I'd always want the 2nd lane as I take 3rd exit.
So on the diagram, where the red line is located, is where Lane 1 becomes empty, because of so much traffic, there is no one using Lane 1 by the junction as everyone is turning off.
So I usually take the Blue line, using Lane 2 on the motorway, to over take the traffic, and pull into lane 2 of the junction. It's mostly free, however when it is standstill, it's best to just queue in lane one.
But as I said, a few times I've had to proceed to the next junction as lane 2 on the junction is full
No idea why I explained this, bored I guess.