Bike routes that require cyclists to share a space with drivers who are traveling above 20 mph (with or without a painted bike lane) are insufficient. For a bike network to be safe enough to encourage large numbers of people to ride, traffic speed need to be limited by physical controls (e.g., chicanes, speed bumps, etc.) to below 25 mph or bike routes need to be physically separated from traffic either by barriers such as bollards or by avoiding co-location.
A bike network that is available only to a privileged portion of the population is insufficient. A bike network should serve cyclists of all ages and abilities and regardless of the neighborhood in which they live.