With the question about all-outs, is it any different to a shuttle signal installation in that sort of instance?
At least in this proposed layout, traffic can see one another on the same approach and can merge back in. It would be a messy and congested affair anyway if that junction was all out!
I wonder if signals are truly the right answer at all for this junction and perhaps a bit of MfS philosophy might be the way to go?
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.
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