Transport Agency Highways Manager Neil Walker says the inland road remains high-risk and unsuitable for cars.
He is expecting that the main roads of Kaikora will be reopened by this weekend.
The coastal roads to Kaikoura were harder hit and are likely to remain closed much longer.
The magnitude 7.8 quake left two people dead, triggered a small tsunami, and brought down rocks and mud that swept across highways. Although the US has a policy of neither confirming nor denying if its military ships are nuclear powered or armed, New Zealand's Prime Minister John Key has said he's satisfied the Sampson doesn't have nuclear capabilities.
Experts said the relatively low death toll was because the quake was centred on a sparsely populated area and hit during the middle of the night, when people were in their homes.
A powerful quake has struck New Zealand near the city of Christchurch, with strong jolts felt over 200 kilometers (120 miles) away in the capital, Wellington. Key's office described the conversation as "very warm and cordial".
The air force has been airlifting tourists and locals stranded in Kaikoura as road access to the town has been cut off. Wellington's central business district has been cordoned off amid fear that a nine-storey building is on the verge of collapsing. Trump had tried to get in touch earlier in the week but Key had missed the call in the confusion after the quake. An natural disaster in 2011 in Christchurch killed 185 people.
The visit by the US ship is significant because it ends a three-decade-old military stalemate between the countries that was triggered when New Zealand banned nuclear warships.
The visit by the USA ship is significant because it ends a 30-year-old military stalemate between the countries that was triggered when New Zealand banned nuclear warships.
Brownlee says despite the change in plans, it is "poignant" to see the anniversary marked with cooperation and camaraderie.
Local residents Chris and Viv Young look at damage caused by an natural disaster along State Highway One, south of the township of Blenheim South Island on November 2016.
The military is using four NH90 helicopters to rescue those stranded by Monday's powerful quake and to deliver supplies.
Home to about 2,000 residents, Kaikoura is a popular destination for travelers taking part in whale-watching expeditions or wanting a stopover with mountain views.
He said the operation could take several days and that if needed, a C-130 military transport plane could drop fuel, water, food and other supplies to the town. Authorities have prepared about 5 metric tons (5.5 tons) of supplies in the city of Christchurch.
Wellington Mayor Justin Lester said the vacant building suffered heavy damage after the quake.
Several blocks were damaged by the tremor, including the offices of Statistics New Zealand, which halted the release of economic data and said it would be months before it could use the building.