One of only two routes on the NSW TrainLink intercity network to run entirely on non-electrified railway lines, the Southern Highlands Line is operated with a rolling stock solely consisting of Endeavour railcars, with most services only using two cars. The service spans 169 kilometers of railway, making it the most extensive route on the NSW TrainLink network apart from the Blue Mountains Line's "Bathurst Bullet" service. The route also spans 22 stations, making it also the route with the lowest number of stops. An additional 2 stations and 55 kilometers of railway are traversed by Southern Highlands trains at peak hours.