Drivers need to slow when passing emergency vehicles with blue, red or magenta lights flashing or alarms sounding.

Since this law came into effect in December 2019, 144 infringement notices have been issued by police for drivers speeding near an emergency, related vehicle or worker.

Tasmania Police Acting Commander Northern District Ruth Orr said it was concerning with these laws having been in place for six months that drivers continued to speed past roadside emergencies.

"In respect of the Northern district we have issued 39 infringements," Acting Commander Orr said.

Acting Commander Orr said the majority of these, about 35, were lower to mid-range speeding between 10km/h to 22km/h over the limit but one particular incident saw a motorist speed past at 44km/h over the limit.

"Motorists might feel because it's not actually on the road they don't need to slow down - regardless of if the vehicles are on the road or off the road they need to slow down," Acting Commander Orr said.

"Our first responders, including police, do respond to a variety of incidents on our roads and that is essentially their workplace at that time.

"It can take quite significant time depending on the circumstances of say, a road crash, to clear that road and for people to do it safely we need our drivers to slow to 40km/h as they go past."

Tasmanian Volunteer Fire Brigades Association president Robert Atkins said he hoped members of the public were taking heed of this law.

"This law was put there for a reason so the emergency worker on the side of the road can go home from their shift and see their family," Mr Atkins said.

"I know people can find it inconvenient but it's something we have got to get used to. If they don't, they will suffer the consequences and hopefully no emergency worker has been injured in the meantime."

Police, Fire and Emergency Management Minister Mark Shelton said it was important to remind the community of this road rule.

"We are in the middle of winter, there are more accidents on the road now - community members need to be extra careful at this time of year," Mr Shelton said.

"We are reminding all Tasmanians to follow the rule to ensure emergency and enforcement workers are able to do their jobs and assist others without putting their own lives on the line.

"As a significant number of road work programs roll out across the state as part of our economic recovery program, it's vital motorists take heed of the rules."