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Development Denied when Traffic is Congested
Half Moon Bay (and San Rafael, apparently) allows new development ONLY if road and other services are adequate.
Lack of adequate road and services shall be grounds for the denial of a development permit.
http://www.coastal.ca.gov/nca/A-1-HMB-99-051-8mmi.pdf page 24.

Level of Service (Traffic):  (L.O.S.)
A scale that measures the amount of auto traffic that a roadway or intersection accommodates, based on such factors as maneuverability, driver dissatisfaction, and delay. for intersections. Determines the impact of auto traffic resulting from new development. Levels of service are:
The Volume to Capacity Ratio (V/C) is also usually shown for each signalized intersection.  V/C measures the relationship of the volume of traffic in an intersection to the capacity of the intersection.
How long cars wait at signalized intersections
A     0-10 seconds     D   >35-55 seconds
B >10-20 seconds    E    >55-80 seconds
C >20-35 seconds     F   >80 seconds

LOS
A   V/C ratio >.59 0-10 seconds	Indicates a relatively free flow of traffic, with little or no limitation on vehicle movement or speed.	Free flow conditions Low volumes High operating speed Uninterrupted flow No restriction on maneuverability Little or no delay Drivers maintain desired speeds
B  V/C ratio .60 - .69 10-20 seconds	Describes a steady flow of traffic, with only slight delays in vehicle movement and speed. All queues clear in a single signal cycle.	Stable flow conditions Operating speeds beginning to be restricted
C  V/C ratio .70 - .79 20-35 seconds	Denotes a reasonably steady, high-volume flow of traffic, with some limitation on movement and speed, and occasional backups on critical approaches.	Stable flow but speed and maneuverability restricted by higher traffic volumes Satisfactory operating speed for urban conditions Delays at signals
D  V/C ratio .80 - .89 35-55 seconds	Designates the level where traffic nears an unstable flow. Intersections still function, but short queues develop and cars may have to wait through one cycle during short peaks.	Approaching unstable flow Low speeds Major delays at signals Little freedom to maneuver
E  V/C ratio .90 - .99 55-80 seconds	Represents traffic characterized by slow movement and frequent (although momentary) stoppages. This type of congestion is considered severe, but is not uncommon at peak traffic hours, with frequent stopping, long-standing queues, and blocked intersections.	Lower operating speeds Volume at or near capacity Unstable flow Major delays and stoppages
F  V/C ratio 1.00+ >80 seconds	Describes unsatisfactory stop-and-go traffic (Marin freeway  today) characterized by “traffic jams” and stoppages of long duration. Vehicles at signalized intersections usually have to wait through one or more signal changes, and “upstream” intersections may be blocked by the long queues.	Forced flow conditions Low speeds Volumes below capacity may be zero Stoppages for long periods because of downstream congestion

L.O.S. for autos presently does not consider the impact on pedestrians or bicyclists.
See San Rafael's Congestion Standards

Sausalito Policy  http://www.ci.sausalito.ca.us/business/cdd/generalplan/cir-parking.htm
Solutions to transportation problems facing Sausalito cannot be achieved without cooperation and joint planning with all Marin jurisdictions. Recognizing this the City is committed to working jointly on regional transportation planning efforts. These include the Highway 101 Corridor Study Committee and the County Planning Agency acting as the Congestion Management Authority.
Countywide efforts include the development of a Transportation Systems Management (TSM) Program and the establishment of a Regional Traffic Mitigation Fee. The City will work with other Marin cities and the County of Marin in the development of these and other regional transportation efforts. It is the City's position that transportation improvements should address existing deficiencies and accommodate managed growth in the County.