The North-West T-way is a continuous series of bus-only lanes and bus roadways between Parramatta, Blacktown and Rouse Hill in Western Sydney.

[1] The Bella Vista–Rouse Hill section of the T-way runs parallel with the Sydney Metro Northwest rail line.

[7] The T-way opened in three stages:[8] A fourth section, continuing from the Blacktown branch and between Burns Interchange to Castle Hill, was never constructed.

Stations feature closed-circuit television, real-time information screens, emergency help points, audio announcements and extensive landscaping.

Parramatta Council complained during construction that noise walls had not been built next to the homes of residents who lived along the T-way route, causing them distress.

[14] After the opening of the first stage of the T-way, a local cycle advocacy group identified a large gap in the cycleway, potentially compromising cyclists' safety.

[17] Another local newspaper reported a traffic barrier separating vehicles from the busway at Westmead railway station was causing accidents.