Klemzig Interchange was built to serve passengers connecting with the Circle Line bus service, which follows the Adelaide outer ring route. Many bus services bypass Klemzig and the station has limited capacity, being the smallest of the three busway stations on the O-Bahn, and the only one to not have buses leave the busway in revenue service until the introduction of services via the O-Bahn to Oakden. It is served by 29 routes.[8][9][10]