 The designated route runs on normal road from Huntingdon to St Ives, then via a bus-only guided section along a former railway line south-westwards into Cambridge, where it rejoins the road at either Milton Road or Histon Road and then continues to Cambridge railway station on normal roads.From there it is again guided to Addenbrooke's Hospital and Trumpington Park and Ride.An additional short spur, to Cambridge North railway station, opened in 2017.