Motorists travelling on SH2 north can expect delays as contractors repair roadside slips around around Sandy Creek near Tutira.
A major slip in May 2011 followed a series of similar dropouts over the years. More slips happened last winter.
Temporary speed restrictions are in place and traffic lights control flow at times, adding up to five minutes to journey times.
Motorists can also expect delays on the highway in the Morere area where drain maintenance work is under way and ant the surface is repaired around Thorpes Bridge on the Kiwi Valley Rd.
Temporary speed restrictions are also in place and stop-go signalling operating.
Similar traffic slowing measures have also been put in place at sites between Otane and Waipukurau where seal widening is under way.