Travel time estimates were about the same, with heavy rail from Britomart to the airport at 39-42 minutes and light rail 42-44 minutes. As with the Waitemata Harbour Crossing designation study, the road builder has forced heavy rail off the agenda for all time. It's not the only thing driverless which comes to mind when it comes to Auckland transport. The benefit-cost ratio of heavy rail was 0.37-0.64, compared to light rail's 1.11 to 1.72. Second, how do you retrofit one of the city's busiest roads with two rail tracks, then run trains, ultimately, at five-minute intervals?

Source: New Zealand Herald June 28, 2016 17:03 UTC