A 20 mph speed limit on minor streets supports safe movement and contextually appropriate design on the majority of city streets. Since minor streets tend to have either very low volumes or operate at the speed of the most cautious driver, cities can apply a category speed limit to minor streets without detailed review of street characteristics.
Minor streets include physically small streets where low speeds are often already present, as well as low-vehicle-volume streets with few or no transit stops.
Minor streets are often characterized by:
> A single moving vehicle lane (one- or two-way)
> Two moving vehicle lanes but fewer than 6,000 vehicles per day
> A “minor” or “local” definition in a citywide street typology or street plan
> Stop controls, all-way stop controls, or yield-controls at multiple intersections
> Yield streets, neighborhood streets, some residential boulevards, one-lane downtown one-way and two-lane downtown two-way streets as described in the NACTO Urban Street Design Guide
> Lateral, service, or access roadways along multiway boulevards
Recommended category speed limit for Minor Streets: 20 mph