Victoria's Great Ocean Road has a status for being one of the world's most scenic roads. In order to truly appreciate it, you need to take it slowly. Yes, you could possibly do it in a day: it is only 150 miles long. It would be a shame to rush it, though. Instead, plan on breaking your journey up into a few overnight stops. By doing this, you have time to really soak it all in. It is easy to find Great Ocean Road accommodation. The road was built for tourists and your arrival is expected.