Greens transport spokesman, Greg Barber, says freeways and road tunnels are inefficient transport options. "They're hugely expensive and actually not very efficient at carrying people," he said. "Clifton Hill railway station actually shifts more people than the Eastern Freeway next door. Just goes to show how inefficient freeways are at moving people."
There's also a really cool blog folks should check out called Transport Textbook. They are covering the investment line by line.