Road crews are also carrying out seal widening and repair work at Morere, Waihua and Matahoura.
At all sites speed restrictions will be in place and Postings said motorists could expect occasional delays for stop-go signalling.
Impacts on travel times could be up to five minutes.
On the southern stretch of SH2 between Hastings and Dannevirke safety improvement work involving seal widening is under way at sites in the Te Aute to Otane area.
Speed restrictions will be in place and some delays can be expected with signalling in place at times.
Contractors have also begun an annual roadmarking programme on SH5 between Napier and Taupo, between Tarawera and Eskdale.
"The work is done as a mobile operation and care is needed when passing the road marking vehicles," Postings said.
The work would have little impact on travel times.
Continuing slip drop-out works at Glencoe Gorge on SH50 and Terapatiki on SH38 between Wairoa and Waikaremoana would also have minimal impact on travel times with temporary give way signs in place.