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San Francisco's recommended bicycle routes are classified into four types, expanding on the standard three types in the California Highway Design Manual.
| Class I |
= Off-street bicycle path |
| Class II |
= On-street striped bike lane |
| Class III |
= On-street signed bicycle route - improvements vary |
| Wide Curb Lanes |
= On-street signed bicycle route with wide curb lanes |
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| SF Bicycle Network (2011)* |
| Bike Lanes |
60 miles |
| Signed Bicycle Routes with Sharrows |
64 miles |
| Signed Bicycle Routes without Sharrows |
60 miles |
| Bicycle Paths (does not include miles of additional dirth paths throughout the City*) |
23 |
| Other Dirt Paths* |
8 miles |
| (Total) |
215 miles |
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| *NOTE: This is the approximate number of miles of City streets with bicycle facilities and not the actual number of miles of bicycle facilities...i.e., it is not 60 miles of bike lanes, but 60 miles of City streets with bicycle lanes (whether a two-way street with bike lanes in each direction or a one-way street with a bike lane in one direction). |
Helpful Resources
Quick San Francisco Bicycle Transportation Information
San Francisco Supplemental Design Guidelines
Additional Bicycle Reports and Studies by the SFMTA
California Highway Design Manual Chapter 1000 (.PDF format)
Manual of Uniform Traffic Control Devices (MUTCD) Part 9 (.PDF format)
Class I Bicycle Paths
Most bicycle paths in San Francisco are multi-use trails. Due to the heavy volumes of non-bicycle traffic, they are often not effective as true "Bicycle Paths."
Class II Bicycle Lanes
Bike lanes can be reassuring to bicyclists who are intimidated by traffic. They provide a continuous visual reminder to motorists to expect bicycles along a street. Bike lanes also help to assign a portion of the available roadway width to bicyclists and thereby reduce conflicts. However, low volume streets with slow speeds tend not to need striped bike lanes even if the width is available because there is ample opportunity for a car to easily and safely pass a bicyclist.
Class III Bicycle Routes
A street may be recommended as part of the bikeway network although no widening or other specific improvements other than signing have been or can be easily implemented to accommodate bicycles. Such Class III routes have an important function in providing continuity to the bicycle route system that serves the entire City and connects with other routes.. As part of the overall bikeway system, Class III routes are signed as bicycle routes and maintained as such.
Wide Curb Lanes
In many instances, there is not sufficient street-width to stripe bike lanes. In these cases when possible, the curb lane has generally been widened so that there would be more room for cars to pass bicycles as safely as possible.
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