This CYCLISTS PLEASE DISMOUNT sign is located beyond a set of temporary traffic lights on Selborne Road. So you wait at red, cycle two yards, and are then expected to dismount so as not to slow motor traffic up behind you in the short time it takes to pass a trench dug in the pavement. So it's only logical to ride past at red, wait behind the blue sign with the white arrow, and pass the roadworks before the lights go to green.
