Brighton and Hove City Council is urging drivers to look out for cyclists before opening their doors after parking.
The council says Portland Road in Hove has seen a significant number of ‘dooring’ incidents over the past three years, resulting in injuries and damage.
Cyclists are also encouraged to cycle 1.5m away from parked cars where possible to avoid any opening doors.
Blatchington Road in Hove is also thought to be risky for riders, and the council said signs are going up in the area urging drivers and cyclists to careful.
Cllr Gill Mitchell, chairman of the council’s environment, transport and sustainability committee, said: “It’s great that more people are taking to cycling but there are risks particularly for new riders who cannot always see the dangers. So we’re urging both drivers and cyclists to be mindful of the dangers of dooring.”
The council is supporting a campaign underway this week by Cycling UK, warning of the ‘car-dooring’ phenomenon.