The busway is wide, consisting of two 2.6-metre wide tracks separated by a central reservation of . Between Cambridge and St Ives there is also a wide (maximum) bridleway/maintenance track to one side and a evacuation strip to the other creating a total width of . Where necessary it is narrower; for example through the Trumpington cutting where there is a single busway with a narrower maintenance-only track giving a total width of approximately . In 2010, proposals were made to reduce the width of the bridleway, narrowing it to 3 metres and increasing the height in order to combat flooding. Elevated sections have two evacuation strips at busway level with the bridleway/maintenance track at the base of the embankment. The bridleway is usable by people on foot, bicycle and horse.