However, because experienced cyclists seek fast direct routes with little regard for volume while casual cyclists favor quieter streets, providing routes attractive to both groups can be challenging. Bicycle advocates often disagree over bicycle facilities . Path proponents like the absence of cars, and bike lane buffs say the stripe makes them feel safe from passing cars. A third group, who feel that unstriped wide outside lanes are safer argue that sidepaths attract walkers, joggers, and dog owners, and create dangerous intersections at cross streets. They point out that unswept bike lanes accumulate glass and gravel fragments because no passing cars go through to disperse them, and that the stripe makes novices stay too far to the right, inviting dangerous right-turn cutoffs by motorists.
Boulevards provide many advantages of paths and bike lanes without their disadvantages.
Their low vehicle volumes and infrequent stops attract all categories of cyclists. Low vehicle volumes enable cars to pass safely using the full street width, with no need for the separation provided by a bike lane stripe. Because cars use the same street space as bicycles, they sweep debris toward the curb. Where such acquisition is impossible, Boulevards may be the only way to provide facilities for cyclists who prefer to avoid high volumes of auto traffic. Portland, Oregon has several Boulevards and is planning more, and seven are planned in Berkeley.