Access to the fire-ravaged Tasman and Forestier Peninsulas has opened to property owners and business operators for the first time.
The re-opening comes as fire crews welcome overnight rain in some of the worst affected bushfire areas.
The highway has been closed for a week after fire ripped through the area, destroying about 120 properties.
A steady stream of cars is slowing making their way through a police roadblock on the highway.
Once past the identification check point, residents are being given protective gear including face masks and overalls.
Some do not yet know if their properties survived the blaze.
Commander Peter Edwards says it will be an emotional experience for many people.
"People need just a bit of quiet time, they don't necessarily know that whether their house is standing or not and it's just important to respect those people and allowing them to return in some sort of quiet or respectful way," he said.
The highway has a reduced speed limit of 60 kilometres an hour.
The fire service says while overnight rain has been welcome, it was not enough to dampen the state's major fires.
About five millimetres fell in the south-east and at Buckland and Lake Repulse.
The most serious bushfire continues to burn in the state's south-east, where a watch and act alert remains.
The fire service's Shannon Fox says while they will use the rain to help strengthen containment lines, there is still plenty of work ahead.
"I guess the main concern going into today is going to be making sure that those north and south fires, even though they've had a bit of rain, just making sure they haven't started anywhere else," he said
"As the day progresses, we just need to make sure we are getting the containment lines that they are deep enough so that so that if the heat does come later in the week that we've got a good enough control that we don't lose the fires again, or we actually have a situation where we can actually have a bit better control over them."
There are at least 150 firefighters working on the fire, including CFA and metropolitan fire crews from Victoria, the New South Wales CFA and remote area teams from New Zealand.
Advice alerts are in place for bushfires at Bridport Road Curries River, Montumana, Mathinna, Buckland, Steppes, Nubeena, Giblin River and Lake Repulse.
Two military planes have arrived in Hobart with equipment to help the bushfire recovery.
The RAAF C 17s were loaded with giant generators for Aurora Energy which is trying to restore power to the Tasman Peninsula.
The planes come form the Amberley air base in Queensland and are usually used to transport troops and heavy equipment to Afghanistan.
Premier Lara Giddings and Aurora's chief executive Peter Davis greeted the planes saying they are providing invaluable assistance to Tasmania in its time of need.
Aurora hopes to restore power to more residents affected by bushfires on the Tasman Peninsula by the weekend.
Hundreds of residents at Forcett, Lewisham, Bream Creek and Dodge Ferry have already been re-connected.
Aurora says work to restore power poles and wires destroyed by the fires is progressing well.
Volunteering Tasmania says it has been swamped with offers from people wanting to join the bushfire recovery effort.
State Manager Jill Maxwell says it has received more than 400 expressions of interest in two days, double the numbers received each month.
Government and relief agencies will get in contact with individuals as community needs become clear.
A team volunteer tradesmen who re-fenced properties ravaged by the 2009 Victorian bushfires is planning a similar project in Tasmania.
Organiser Norm Cairns says the team hopes to start work next week and is looking for more volunteers.
The first priority will be fencing livestock paddocks.
Farmers have been told they do not need to wait for insurance assessors before putting down animals injured in bushfires.
Insurance Council spokesman Karl Sullivan says insurers usually just require farmers to photograph wounded livestock, or collect tags.
"Unfortunately there were some media reports last night, quoting some individuals saying that they weren't able to dispose humanely of their livestock that'd been injured in the fires because apparently they felt they needed to wait for an assessor to attend."
"So that's completely wrong, all you need to do if your animals are insured and you will be making a claim is to contact the insurer."