The Auckland Harbour Bridge is back to 100 percent capacity

All eight lanes reopened last night, after almost three weeks of delays due to reduced lanes.

Canterbury University structural engineering professor Alessandro Palermo says one of the many lessons learnt is that a tipping truck could cause extreme damage to the structure.

He says in future, a better traffic management control will need to be looked at in strong winds, as well as an alternative route.

Palermo says we need to start planning an additional route connecting the city to the North Shore.