The Pacific Highway is the major road link between Sydney and Brisbane. Additionally, it passes through a populous area of New South Wales, connecting you with many of the state's major cities and towns. The Pacific Highway is 800 km long. It is possible to drive up the highway in a single day, but this is a six-segment itinerary with several shorter drives and a number of stops in New South Wales cities.
When planning a trip up the Pacific Highway, the major consideration is holidays. The Pacific Highway links several large Australian cities and also passes through major beach holiday areas close to Sydney. Thus traffic is absolutely nightmarish at either end of a holiday period; it's not unheard of for trip times to be four times as long. The worst times to be traveling north are the afternoon and evening of Christmas Eve (or of the day before if Christmas Eve is a Sunday), the afternoon and evening of the day before the Good Friday holiday and the night before and morning of the first day of any long weekend. When traveling south, the end of holiday periods are the peak time. Since Australians take summer holidays in January, you will also want to avoid traveling north on the Friday or Saturday of any weekend in January, and likewise avoid traveling south on Sundays in January.
As the Pacific Highway is a major road passing through a populated area, there's no need to take special precautions as you might when driving through a remote area. It might be a good idea, as with all car trips, to make sure that you have food, water and warm enough clothing so that having to sleep in the car for a night wouldn't be a disaster. However, you will have ample opportunity to purchase all food and drink along the way.
You can start from either end of the road, or from many points along its length. To the south, Sydney is a major gateway, and to the north Brisbane and the Gold Coast both have many transport options. You can hire a car at either end, shop around for a good one way deal if you need one.
Upper North Shore to the Central Coast
Speed Limit: 80-110
This section of the drive offers drives through national parks, bushland and small townships and communities. It is easy to stop and take advantage of bushwalking opportunities, coffee shops and views, and beaches.
This section of the road can be used as an alternate solution if you want to bypass the Pacific Motorway, and is pleasant a quiet driving if you are not in a hurry.
Speed Limit: 70-110
The road is a fully 4-lane motorway with exceptions in Newcastle.
Port Macquarie to Coffs Harbour
Speed Limit: 110
Starting from a junction with the Pacific Highway at Raleigh, midway between Urunga and Coffs Harbour, Waterfall Way travels westward to Armidale. This route has been voted the best tourist drive in NSW and in the top 3 of Australia. The old highway has also been renamed as Macleay Valley Way and Giinagay Way, with the new highway being named the M1 Pacific Motorway.
Speed limit: 110
The highway is four lane motorway
Ballina to the Gold Coast
Speed Limit: 110
The highway is four to six lane motorway
Speed limit: 100
The highway is an eight-lane motorway.
Go along M1/A1 Bruce Highway