Key features
Cycle streets (also known as 'boulevards') are a form of mixed-traffic street where the needs of cyclists are prioritised over motor vehicles. Bicycles should be the dominant mode, whilst the number of motor vehicles should be minimised and so cycle streets are most likely to be implemented on through or main cycle routes where motorised traffic requires access to local destinations.

Cycle street, Malmo
On cycle streets, design and signage should clearly assign priority to cyclists and the route should be attractive to cyclists due to its comfort and directness. Bicycles should also have right-of-way at intersections in order to improve comfort and speed. Cyclists can be allocated space through central lanes or a wide advisory strip either side of the road.
The Belgium cyclist’s union indicates that a cycle street should not be over 500m in length, although Belgium regulations do not allow motor vehicles to overtake on cycle streets. Longer cycle streets can be designed so that cyclists are not being followed by cars for long stretches, which can cause stress for both road users. For example, sections of filtered permeability can be implemented, or contraflow sections can force cars to turn off but allow cyclists to continue ahead.
As there are no agreed criteria on the implementation of cycling streets at the EU level, Member States have different standards, some of which have legal status whereas others do not. Therefore, cities considering the implementation of cycle streets should ensure they are able to implement cycle streets as desired, whilst adhering to national regulations, standards or traffic rules.
Function and objectives
The objective of cycle streets is to provide a safe and attractive route for people who cycle that clearly assigns priority to cyclists. They also aim to attract both experienced and less confident cyclists (through their cycle-friendly design).
Alternatives
The Malmö case study example demonstrates that even where specific national regulatory provisions are not available to implement cycle streets, other cycle actions and measures can be adapted to achieve similar conditions and results. For example, measures that give priority to bicycles on roads and at junctions.
Complementary measures
Cycling streets are likely to incorporate a number of measures such as 4.1 Bicycle prioritisation through traffic management and ITS, 1.7 Mixed-use zones or 1.6 Contra-flow cycling in order to achieve priority, directness and comfort for cyclists.
Performance
Cycle streets improve conditions for cycling by providing a safe and attractive environment. They are likely to benefit residents and pedestrians through reduced traffic speeds and attractive design, and an improved street environment may positively impact local businesses.
An increase in the modal share of cycling may be achieved when a cycle street is implemented as part of a cycling network/strategy within a city. Malmö's cycle street observed increased numbers of people who cycle, as well as improved travel time, comfort, and road safety conditions for people cycling. Elsewhere, an evaluation of a cycle street in Oss (Netherlands) in 2004 found that cycling increased by 11% whereas motorised traffic reduced by 30% (Sustrans, 2014). Cycle streets are therefore likely to have positive impacts on safety, community, accessibility and modal share.
Parameters of success or failure
Similar to other measures that place restrictions on motorised traffic, cycle streets have the potential to attract criticism from the public or other stakeholders. Concerns were expressed in Malmö regarding the removal of car parking spaces and restrictions on traffic flow. Therefore, engaging with the public during the planning and design stages of cycle streets is important to raise awareness and minimise negative opinions and the chance of complaints. Firm political support despite initial concerns can be a crucial factor in ensuring the successful implementation of the measure.
Cycle streets tend to be most successful where there are high numbers of existing or anticipated cyclists and when bicycles are the dominant mode. Sustrans suggest that there should be at least as many cyclists as motorists (Sustrans, 2014), although a 2:1 ratio of bicycles to cars is desirable. Dutch guidance suggests that cycle streets can be considered where there are at least 1,000 cyclists per day, while national guidelines suggest maximum motorised traffic of between 1,000 and 3,000 vehicles per day. Even if a 2:1 ratio was maintained, it is likely that the comfort, safety and overall attractiveness of the routes would reduce at higher traffic volumes.
Finally, cycle streets can be more successful when there is adequate space for all road users to minimise potential conflicts [see Malmö case study).