Protected bicycle lanes consist of a separated lane for cyclists on each side of the street. Cyclists are protected from motor vehicles by a kerb. Protected bicycle lanes reduce the risk to cyclists by eliminating the hazards imposed by motor vehicles, such as dooring and collision.
Popular around the world
Protected bicycle lanes are increasing in popularity around the world, even in the USA:
VicRoads Traffic Engineering Manual Volume 3 Part 2.16 recommends the installation of protected bicycle lanes on all streets where the speed limit is 40 km/h or above. This applies to all nominated arterials in Yarra, or any street that has not been slowed to 30 km/h or lower.
Best practice design
A best practice protected bicycle lane is elevated up above the road, to distinguish it from the traffic lane, as well as being protected by a kerb. The lane continues at the same higher grade when crossing minor side streets, in a similar way to continuous footpaths.
Kerbs should present a 90 degree (or vertical) barrier to vehicles, to discourage them from entering the bicycle lane, and a 30-45 degree (or forgiving) slope to bicycles, to decrease the likelihood of a crash if they contact the kerb.
A best practice bicycle lane is 2.3-2.5 m wide and paved with high quality coloured asphalt, to provide low rolling resistance and to distinguish it from the black asphalt used for the traffic lane.
Lower cost options
Protected bicycle lanes can be also be built for lower cost, as demonstrated by this example from Canada:
Supporters in Australia include We Ride Australia, who all advocate for networks of safe cycling infrastructure, including protected bicycle lanes:
Learn more from this collection of design guides, or the Dutch (CROW) guide to bicycle infrastructure: