Roe to Kelvin Upgrade Planning is also underway to upgrade Tonkin Highway to freeway standard south of Roe Highway, with the section between Roe Highway and Kelvin Road expected to be looked at first. It is planned to widen the highway to six lanes with the intersections with Welshpool Road East and Kelvin Road to be converted to full interchanges as well as construct a new cycle path parallel with the highway. The other at-grade intersection, Hale Road, is provisionally planned to be converted to a half-diamond interchange with northbound-facing ramps connecting to Tonkin Highway through the neighbouring Roe Highway interchange. Southern extension Tonkin Highway reaches past the edge of suburbia at its southern extent. Planning provides for it to be extended when required. The initial plans indicated the extension would continue south through undeveloped or semi-rural areas such as Mundijong, Cardup and Jarrahdale. South of Mundijong, the planned route would deviate east to terminate at South Western Highway near Jarrahdale Road, which would then be upgraded. Following the 2001 state election, the new government abandoned the Jarrahdale Road option, preferring a shorter route that deviated to South Western Highway near Orton Street, closer to Byford. In July 2012, seven years after the previous extension was completed, the Minister for Transport announced the formation of a community working group to investigate an extension of Tonkin Highway beyond Thomas Road. The group met several times to identify and evaluate possible solutions to traffic congestion in the area, and prepare a strategic business case for the next extension. , the preferred options are to extend the highway to South Western Highway, at a location either south of Lakes Road or south of Mundijong Road. The long-term plan for Tonkin Highway extending southwards, outlined in Perth's transport at 3.5 million plan is for Tonkin Highway to be eventually extended as a freeway standard link to Forrest Highway south of Pinjarra, but no planning has been done for this, and the transport plan has said that this is very far off in the future, and is unlikely to happen until after 2050. Interchanges and intersections See also Highways in Australia List of highways in Western Australia List of major roads in Perth, Western Australia Notes References External links Main Roads Western Australia Gateway WA – Perth Airport and Freight Access Project 1955 Atlas – "Plan for the Metropolitan Region" (Stephenson & Hepburn). Plate 9