The trajectory forced by the barriers on the South ramp of the Swavesey bridge is unsafe. Once a rider has made the transition a few times speeds increase. The resultant path is actually worse than the unmodified elbow in place since July. I’m a fairly slow rider and this clip is at actual speed. Without the fenced elbow a runaway would simply end up on the verge, axle deep in mud.
The elbow creates a hazard and the route is indicated as making a right turn onto the roadway toward Boxworth. The roadway has no markings, signage or speed control at this point so, although there is a refuge of sorts on the island, this is an unsafe situation for the cyclist in many ways.
Without barriers a transition with good visibility of approaching motor traffic can be achieved and a 2 step crossing can be made at a safer distance from the roundabout. It is possible the intention was to allow cyclists to progress counter-clockwise around the roundabout to get to the facilities at Cambridge Services, something which may be in the future as the site is being remodelled just now.