Route planning has been completed to Pembroke, with a bypass to the east of the Cobden area. The second phase of the extension to be built (phase 1 was the section around Arnprior) is a extension past Campbell Drive to Scheel Drive northwest of Arnprior, under construction and completed in 2016. Phases 3 and 4 total including four new interchanges and will take the 417 from Scheel Drive to a point 3 kilometres (2 mi) west of Bruce Street (Town of Renfrew). The design stage of this phase was announced in August 2017.