The future Parramatta Light Rail will include stops at up to six train stations in Sydney's west, under the state government's plan for the network.

At an industry briefing held on Monday morning, plans were announced to create transport interchanges at Westmead, Parramatta, Olympic Park, Strathfield and Carlingford trains stations.

The 20-kilometre light rail track, construction of which is due to start in late 2018 and be completed by 2023, will run from Westmead to Strathfield, with a second line branching to Carlingford.

The briefing paper did not identify the location of the sixth interchange and did not include one at Camellia, which is where the two branches of the line will interconnect.