Motorists have been warned of a transport worker strike affecting roads on Monday.

More than 450 Queensland workers will walk off the job for 12 hours as the union and state government remain locked in a bitter pay dispute.

The members of the Professionals Australia Union will not work from 6am to 6pm.

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“The stoppage is expected to cause delays to all major transport infrastructure projects and impact the traffic network,” Professionals Australia said.

“The action comes after months of stalled negotiations and follows moderate industrial action last week, during which around 150 members were sent home without pay for participating in lawful work bans.”

Professionals Australia Queensland director Sean Kelly said the government is using a withholding of backpay for the income lost that day “as leverage in negotiations”.

“Our members are responsible for planning, delivering, and maintaining the infrastructure that keeps Queensland moving, but they are being paid up to 20 per cent less than their counterparts working on the exact same projects,” Kelly said.

A Transport and Main Roads spokesperson told www.20304050.best that the TMR Certified Agreement 2022 expired on June 30.

“TMR has advised the union and its members that it supports a union member’s right to take protected industrial action,” they said.

“We do not anticipate any significant impact to TMR projects, but we will continue to monitor the situation and make the required workplace adjustments to ensure this is the case.

“As per usual process, we will make arrangements to accommodate these employees. TMR is committed to continuing to meet with representatives of the union to reach an in-principle agreement.”

A rally is also taking place outside the office of Queensland Department of Transport Minister Brent Mickelberg.

Transport workers maintain and plan infrastructure on the state’s roads, and respond to crashes and roadworks.

Their industrial action is the latest to recently hit the state, after the Nurses and Midwives Union took strike action in June, and Health Minister Tim Nicholls agreed on an eight per cent pay rise over three years for public servants including doctors and protective services officers.

Firefighters are also currently voting on whether to strike, and teachers have warned parents to keep their children home on Wednesday as state school staff strike, affecting 570,000 students.