The NSW Government has announced a comprehensive five-year plan to improve passenger access to information on CityRail trains and stations.

The improvements include trialing new technology on the Illawarra lines to upgrade the scrolling screens displaying passenger information, so signal box operators can make adjustments to information line by line.

The Minister for Transport, John Watkins, says there will also be an expansion of the long line public address systems on south coast and Southern Highlands' lines.

"This technology allows rail operators at the rail management centre in the city to make announcements to passengers to all stations directly, so instead of the rail management centre having to contact each station who would then be able to make an announcement at that particular station, we'll be able to make public announcements that come from the city," he said.

ABC Regional Online