The Australian Rail Track Corporation has completed level crossing upgrade works at Harefield between Wagga and Junee during a "three-day rail blitz" over the weekend.
The $688,000 upgrade at Harefield Road level crossing to install high-intensity LED lights and reflective boom gates was originally scheduled to take place back in June.
The ARTC was also due to complete works on a surface crossing at Uranquinty and two level crossings at Henty by 6pm on Monday.
ARTC general manager for asset management Brian Green said the upgrade was carried out to improve safety for light and heavy vehicle users.
"The level crossing at Harefield is being upgraded to improve safety for the roughly 300 road users including up to 50 heavy vehicles accessing this crossing each day," Mr Green said.
Mr Green said ARTC rescheduled the level crossing upgrade work from June due to operational issues.
"During the course of pre commissioning work, a more extensive impact on the operational network was identified and work was delayed to allow further planning work to occur," he said.
"With trains not running during the upcoming Southern NSW rail maintenance shut down, final commissioning can now be carried out."
The Harefield works were part of a "massive annual maintenance program" worth $8 million between Moss Vale and Albury and from Cootamundra to Parkes.
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"This year's works include track re-railing, resurfacing and reconditioning, as well as level crossing upgrades, track ballasting, turnout maintenance and bridge maintenance," Mr Green said.
"ARTC makes the most of these short windows to carry out jobs in a planned approach that minimises the impact of major works on train operations and reduces the potential for unplanned downtime on these sections of the rail corridor.
"The maintenance program requires track closures to allow access to the tracks for works that cannot be done safely when trains are running."
ARTC said some works will continue until September 11 but will cause "minimal impact to the community".