the west by a pedestrian bridge. To the east is Neerabup National Park, and so there is no access to the east. The pedestrian bridge is linked to the platforms by stairs, a lift and a set of escalators. On the western side is a six-stand bus interchange, a drop off area and two carparks. The carparks have 1,059 standard bays, 10 short term parking bays and 20 motorcycle bays. At the entrance building is a transit officer booth, toilets and bicycle parking shelters. Clarkson is listed as an independent access station on the Transperth website as the platform can be accessed using lifts, the platform gap is small, and tactile paving is in place. Public art On the wall of the entrance building is a piece of public art titled The Bag Project, by Margaret Dillon from art design and construction company Concreto. It consists of a series of 44 terrazzo tiles. The tiles, which have various colours, "depict images associated with the everyday commuter experience". The other piece of public art at Clarkson station is Line over Contour, by Stuart Green. This consists of stainless steel and painted steel panels mounted on a steel tower above the entrance building. History The original stage of the Joondalup line began construction in November 1989. It was opened between Perth station and Joondalup station on 20 December 1992, and extended to Currambine railway station on 8 August 1993. By 1995, planning for extending the Joondalup line north of Currambine was underway. On 20 November 1996, Richard Court, the premier of Western Australia, announced that his government would extend the railway to Neerabup Road in Clarkson at a cost of $28 million, including $12 million in additional rolling stock. On 28 November 1999, the Parliament of Western Australia passed the Railway Northern and Southern Urban Extension Bill, enabling the construction for the extension to Clarkson and a new railway to Mandurah south of Perth to begin. The Northern Rail Master Plan was released on 21 June 2000. The plan detailed the extension to Clarkson as well as the construction of Greenwood railway station along the Joondalup line. The cost of the extension had been revised to $58 million, with an additional $23 million for rollingstock. The new railway to Mandurah, the extension to Clarkson and the new station at Greenwood were all brought into a single project called the Perth Urban Rail