Cyclists are being warned to make sure their wheels do not get wedged in tram tracks on streets around Auckland's Wynyard Quarter.
They are advised to cross the tracks of the new 1.5-km Dockline tram circuit at right angles.
Waterfront Auckland also wants pedestrians and motorists to take extra care around the first trams to run on city streets since 1956 except for the Museum of Transport and Technology's operation at Western Springs.
"It's been more than 50 years since the public has encountered tram tracks and trams operating on busy city streets," said chief executive John Dalzell.
"In the meantime the gauge of cycle tyres has changed and tram tracks are a potential hazard to cyclists who might not be aware of them in the roadway."