About 20 black rabbits have been spotted at the busy roundabouts.
Some motorists posted their concerns on the People's Independent Republic of New Brighton Facebook page about people wanting to view the rabbits.
The concerns raised were about motorists driving slowly to look at them and others parking up and crossing the road with children to get to the roundabouts.
Transport for Christchurch posted a video on its Facebook page of the rabbits with a safety message.
"It is not a good idea to take (children) across the road onto the roundabout," the post said.
"We all know how unpredictable young children can be when over-excited, this could also endanger the rabbits and scare them into running on to the road. This is a state highway and heavily used by large trucks."