But a New Zealand Transport Agency spokesperson announced yesterday that contractors would suspend their operations at 3pm so most fans could still use State Highway 29.
This means people travelling to the game from Tauranga before 3pm will face disruptions, but for those leaving after 3pm and for the return leg home the route should be clear.
Sam Ager, an All Blacks fan heading from Welcome Bay for the test match in Hamilton, said she had planned to head over earlier in the day, but would now rethink the plan.
"I'm going over with my husband and our 14-year-old daughter and our other daughter is at university in Hamilton so we'll pick her up on the way. As soon as the tickets came on sale we got them straight away.
"I'm glad I saw it [the route changes] so at least then we can decide what we want to do. We were planning to head over earlier but we'll have to decide what we're doing now," she said.
NZTA Bay of Plenty state highways manager Brett Gliddon said the road closure was necessary.
"These trees and rocks are a potential risk to the safety of people using the highway, so it's important that we take proactive steps to remove them now.
"We are very aware that SH29 is a high-use highway ... That's why we've timed the major part of the works to take place over the weekend, when heavy freight traffic volumes are lower than levels during the week.
"The follow-up work from Monday to Wednesday has also been planned to minimise disruption to school traffic, by keeping the one-hour closure periods away from the beginning and end of the school day," he said.
An NZTA spokesperson added that the agency knew the road closure could interfere with fans' travel plans to Hamilton, but said the decision was a calculated one.
"It was either now or school holidays [which start next weekend], and school holidays is much harder to deal with than just one day of an All Blacks test," she said.
Senior Sergeant Ian Campion, the officer in charge of road policing in the Western Bay, said motorists should take care on the alternate routes and allow an extra 30 minutes for their trips.
"The diversion route [through Wairoa Rd to SH29] is a rural road which is narrow at times and will need special care. Allow an extra half-hour - it's about making sure you plan your trip with the diversions in the back of your mind," he said.