Cyclists need to make sure they are well lit as daylight saving ends, say the Cycling Advocates Network and Bike NZ.
"The end of daylight saving on Sunday means it's time for cyclists to check their lights and batteries," says CAN spokesperson Patrick Morgan.
"Some may be caught out by earlier evening twilight, so we all need to be extra careful."
"Lights, reflectors and high-visibility riding gear make you easier to see," says Mr Morgan.
"Cycling offers the ultimate trip: it's a fast and flexible way to get around, while improving your health at the same time."
"Our message to bikers is to get out there and enjoy the ride, and to remember to use lights whenever visibility is poor."
"For drivers, the message is to look twice for people on bikes."
Daylight saving ends on Sunday 1 April, when clocks go back one hour.