Traffic in several of Auckland's suburbs is so bad some companies are refusing to deliver there, says Infrastructure New Zealand.
A report from the New Zealand Institute of Economic Research yesterday showed traffic congestion was costing the local economy up to $1.9 billion a year, but Infrastructure New Zealand chief executive Stephen Selwood said some areas were bearing the brunt of the problem.
"It is an issue, we're hearing stories of freight companies not going into Devonport now for example," Selwood said.
"They call it the 'black hole', in other words they send a truck in there and it never seems to come back out again.
"So they just don't deliver there anymore.