Road maintenance worth more than $20 million will happen between now and April.

The Infrastructure Minister, David O'Byrne, said about 120 projects will cover both state and national roads.

"Road maintenance saves lives, connects Tasmanians, and supports jobs in our key industries" Mr O'Byrne said.

"People driving to work or visiting their family deserve the safest possible roads, and we're determined to play our part.

"After some particularly wet summers, we're looking to make some really strong progress in this maintenance season.

"All roads suffer wear and tear, and we'll probably never get rid of human error as a cause of crashes.

"But good maintenance and new technology do make a difference. That's why they're front-and-centre in our successful Road Safety Strategy," he said.

Tasmanian contractors will perform the upcoming maintenance program as follows:

• Roadways Pty Ltd - about 80 kilometres of road in southern Tasmania.

• Venarchie Contracting Pty Ltd - about 75 kms in the north-west.

• Downer EDI Works Pty Ltd - about 50 kms in the north-east.

The Midland Highway is a particular focus, with major pavement treatment works in 2012/13. That includes:

• Kempton Bypass - resurfacing

• Mood Food Straight - pavement repairs

• North of Melton Mowbray - pavement rehabilitation

• North of Lovely Banks Rd - pavement rehabilitation

• North of Spring Hill - pavement rehabilitation

• St Peters Pass - resurfacing

• Campbell Town Straight (South) - resurfacing

• South of Perth - pavement rehabilitation

Other projects include resurfacing works on:

• the Tasman, Arthur, Huon, Lyell, East Derwent, Brooker and Midland highways in the south;

• the Bass, Murchison and Stanley highways, as well as Sheffield and Frankford Main Roads in the north;

• and the West Tamar and East Tamar highways, as well as Lake Leake, Gladstone and Bridport Main Roads in the north-east.

The works may cause some delays for drivers, but must happen in the summer sealing season.

DIER is reminding drivers to take care and obey all traffic signs, to help keep themselves, pedestrians and road workers safe.

A full list of the projects can be found at www.dier.tas.gov.au