Dave, I don’t believe it is in yet. I would be curious to see any Safety Audit report prepared for the scheme. Certainly the operation of the junction, in the event of power failure, is a fundamental concern. It is a very busy corridor, so the comments relating to queuing and potential exit blocking are also pertinent.
As Gregor says what happens when the signals are off. I think this arrangement leaves the highway authority open to claims in the event of collisions. I would also have concerns about the practicality of it too – all those box markings suggest that queues are common so all too easy for ahead traffic to stop beyond the stopline but not in the box (across the ped crossing admittedly) and then block the right turners who get a green in the stage before the ahead traffic.