North of Auckland three pressure points were identified on SH1 - between Puhoi and Wellsford, at Whangarei and Kawakawa in the far north.
Wellington holiday makers travelling on SH1 were also likely to face long delays tomorrow, particularly in the middle of the day - between 11.30am and 4pm.
The route was heavily congested between Plimmerton and Otaki for much of yesterday afternoon after a truck rolled in the southbound lane at the Paekakariki Hill Rd intersection.
NZTA asked motorists to "take extra care" and travellers faced delays of up to an hour because of the blockage.
SH2 out of the capital would also be busy for most of the day today, according to NZTA. The road should flow well for most of Sunday, but would be busy again between 8am and 1.30pm on Monday.
Cantebury's main highways would also be congested today, with NZTA predicting pressure points on SH7 through Lewis Pass and SH73 at Arthurs Pass for most of the day.
A fatal crash blocked SH12 at Aranga, in Northland tonight. Diversions were in place as the Serious Crash Unit investigated the single-car crash which claimed the life of one man.
The death brought the holiday road toll to 14. Last year 12 people died on New Zealand roads during the Christmas holiday period. There are still five days left before this year's official period ends.
Police said on Thursday they were extremely disappointed with the grim holiday road toll, saying all the fatal crashes were avoidable.
National road policing manager Steve Greally said he was perplexed the toll has suddenly shot up in such a short time and concerned motorcyclists made up a third of the fatalities.
"It's horrific," said Greally.
"For whatever reason people seem to have left their common sense at home. I'm just not sure why.
"It doesn't matter how disappointed I am there, are families across New Zealand ripped apart by this."
Heaviest traffic times
State Highway 1, south of Auckland (Takanini)
Northbound
Jan 3: 12.30pm-4.30pm
Jan 4: 1pm-4pm
State Highway 1, north of Auckland (between Puhoi and Wellsford)
Northbound
Dec 31: 11.3am-3.30pm
Jan 4: 12pm-1.30pm
Southbound
Jan 1: 10am -6pm
Jan 2: 10.30am-8pm
Jan 3: 11am-5pm
Jan 4: 11am-1.30pm
State Highway 2, toward Coromandel, Tauranga (Maramarua)
Eastbound
Dec 31: 11.3am-3.30pm
Jan 4: 12pm-1.30pm
Westbound
Jan 1: 1pm-7pm
Jan 2: 11am-7.30pm
Jan 3:12pm-6.30pm
Jan 4: 12.30pm-3pm
State Highway 1, north of Wellington (Kapiti Coast)
Southbound
Jan 1: 3pm-4pm
Jan 2: 11am-8pm
Jan 3: 11am-7.30pm
Jan 4: 12pm-6pm
Northbound
Dec 31: 9.30am-4pm
Jan 1: 11am-3pm
Jan 2: 10am-3pm
Jan 3: 10am-3.30pm
Jan 4: 10am-12.30pm
State Highway 2, north of Wellington (Rimutaka Hill)
Northbound
Jan 2: 9am-12.30pm
Southbound
Jan 2: 3pm-7pm
Jan 3: 4pm-5.30pm
Source: NZTA