Marin staff propose 50-foot minimum between development entrances, consider 20 mph citywide residential speed limit

City staff told the Marin City Council at its June 4 workshop that a proposed code update would set a 50-foot minimum distance between separate points of ingress and egress for communities of 50 or more dwelling units, and staff also described plans to pursue an administrative action to set a 20 mph speed limit on most residential streets.

City Manager Jim said the 50-foot figure represents a working minimum being considered for the city's specifications for streets and stormwater appurtenances. He described the measure as derived from emergency-services and sight-line considerations but said the requirement "may end up being more by the time we get it to the planning commission." Jim added that sight-distance requirements on higher-speed roads would continue to be driven by speed limits and state highway standards.

On speed limits, the council discussed the prospect of a citywide residential speed limit at or below 20 mph. Staff said adopting 20 mph as the administrative standard for residential streets would harmonize newer developments where 20 mph is already common and would not raise lower posted limits. The city manager said staff has not yet counted signs or estimated replacement costs and that implementing changes would not be immediate.

Why this matters: Changes to street-spacing and speed-limit policy affect the design of new multi-unit developments, emergency access, traffic calming, and the cost of replacing or updating signage. Staff said the proposal will proceed to the planning commission, where standards and sight-line requirements could be adjusted.

Next steps: Staff will refine the draft specifications and bring recommendations to the planning commission and future council meetings; no formal ordinance or final vote occurred at the June 4 workshop.