Islands created to offer a physical barrier of protection from cars are apparently making cyclists more difficult to see for drivers turning left at intersections.

Cyclists travelling along the dedicated bike lanes have right-of-way over a motorist turning left at intersections.

Due to the distance between cyclists and motorists, RAA senior manager for Road Safety Charles Mountain told 891 Breakfast riders may find themselves inadvertently placed in the blind spots of turning vehicles with the possibility of collisions heightened.

"They almost need to look over, past 90 degrees, to see an approaching cyclist."

Due to the uniqueness of the separated cycling lane, Mr Mountain said motorists should take extra care to look for cyclists and both parties would need to be aware of the hazard.

"You can't assume the other party knows exactly what should happen."

Audience texts to the program offered a range of experiences:

"Just close the road it has become a disaster zone. I work on Flinders Street and it can take four sets of lights on Flinders and Frome to get going up Flinders to Hutt St. Either it is a through road or a bike way it is a fiasco!!! Anne"

"Cyclists assume drivers see them and seem a law unto themselves and some motorists don't think about cyclists. A media advertising campaign would be good to help educate. Geri from Woodcroft"

"It is impossible to see a fast moving cyclist as the turning motorist cannot see them thru the parked cars particularly thru a truck which completely blocked my view yesterday. Ann"

"How quickly everyone forgot the almost identical Sturt St experiment which was a disastrous failure. John (cyclist)"

"Ride your bike as if everyone is trying to kill you- Fitsy"