Changes will be made to the rules after a year-long trial period of requiring drivers to slow down to 40 kilometres an hour when passing stationary emergency vehicles, with flashing blue or red lights to now include breakdown assistance and tow trucks with flashing yellow lights.

There are also going to be changes to the speed drivers will be required to do when passing these emergency vehicles.

From September 26, drivers will no longer need to slow down to 40km/h on roads with speed limits of 90km/h or over, although they will be required to drop back to 40km/h on roads with speed limits of 80km/h or under.

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Wagga's Craig Glasson, a licensed tow-truck operator and owner of Craig Glass Smash Repairs, said the changes were both welcome and long overdue.

Mr Glasson has been pushing for changes that protect all types of service vehicles, as all were equally vulnerable when attending accidents and breakdowns on public roads.

He was also quick to praise most drivers, who were careful when passing emergency incidents.

"The majority of drivers are pretty good when we are there," Mr Glasson said.

"The truckies will get on the two-way and warn others to slow down if they see us."

Minister for Roads Andrew Constance said 926 infringements were issued during the 12-month trial of the new rules, which are aimed at keeping emergency service workers safe while working by the roadside.