The Minister for Urban Infrastructure has provided the following answer to the honourable member's question:

(a) Early 2018.

(b) Australian Government funding is allocated from 2016-17 to 2019-20.

(2) Infrastructure Australia is currently evaluating the Armadale Road business case, which will be released when finalised.

(3) No

(4) The Western Australian Government is responsible for project development works including traffic modelling.