The Transport Agency figures show more than 6.5 million vehicles have travelled through the $1.4 bn twin tunnels since they opened in July, more than 400,000 trips each week. The NZTA says travelling from the airport to the CBD during peak afternoon weekday times used to take between 35 and 44 minutes via Manukau Road and Gillies Ave, it now takes 25 minutes through the tunnel. Urban advocate Patrick Reynolds from Greater Auckland discusses the benefits and advantages.