Albany Highway, heading south towards Walpole on Western Australia's southern coast. Brookton Highway (State Route 40) leads from Albany Highway in Kelmscott (just north of Armadale) south-east towards Brookton. From the Midland area, Great Eastern Highway connects to Kalgoorlie, and is part of National Highway 94, which leads to Adelaide, South Australia. Great Northern Highway links Perth to Wyndham in the state's north, and is the majority of National Highway 95 to Darwin, Northern Territory. It also carries Highway 1 northwards out of Perth. Toodyay Road (State Route 50) is a third route out of Midland, heading north-east to Toodyay. Wanneroo Road (State Route 60) is a north-western route from Perth towards Yanchep and beyond, and Marmion Avenue provides a parallel route to Yanchep. Ring Road Roe Highway offers a controlled access route between the Kwinana Freeway, east of Jandakot, east of Fremantle, and Midland. There is a plan to extend Roe Highway, Perth's southern half of its ring road, towards Fremantle via overpasses and a tunnel. If the extension is approved, it will become Perth's only toll road. In Middle Swan, one suburb north of Midland, Reid Highway is the continuation of Roe Highway, travelling west to North Beach, where it meets Marmion Avenue. Traffic congestion Weekday traffic congestion is worst during the morning peak hour, when traffic regularly slows to almost half the speed limit. Depending on the road, the weekday peak hour is usually about 7am to 8am, or 8am to 9am. On weekends, congestion is worst later in the morning and harder to predict. Rather than being on roads into the central business district, it centres on beaches, shopping centres, white goods and other big-box stores, and children's sporting grounds, such as netball courts. Public transport Perth metropolitan public transport, including trains, buses and ferries, are provided by Transperth, with links to rural areas provided by Transwa. Perth provides zero-fare train trips for SmartRider (travel fare card) holders around the city centre (the "Free Transit Zone"), as well as four high-frequency (every 8–15 minutes) Central Area Transit (CAT) bus routes (Red, Blue, Yellow, Green), which, alongside trips on regular Transperth buses in the city centre, are free to all users. Suburban rail There are five main rail lines, 70 stations and 15 bus stations in the metropolitan area. Bus An extensive bus network services the greater Perth metro area. Many bus routes act as feeder routes