The professional firefighters' union says fire vehicles are being damaged and response times are being compromised by speed bumps and other traffic calming measures around Tāmaki Makaurau.

They say more and more speed bumps are being placed on busy city roads.

Auckland Transport has engaged with Fire and Emergency but firefighters say it's a frustrating situation.

Firefighters Union Auckland President Terry Bird says it's making their job very difficult.

Auckland Transport responded with a statement.

"Through our partnership and engagement work with FENZ,  AT has delivered significant time savings for FENZ crews.

"We created a 'green wave' of traffic lights throughout the city centre to help speed up response times and give a continuous cycle of green lights where possible during callouts.

"AT also modified the design of raised safety platforms, especially for those installed on primary FENZ response routes.

"After being asked by FENZ, we gave all FENZ marked and unmarked emergency response vehicles pre-exemption to use all our busways and bus lanes."