Post 1964 Legislative Route 251

Click here for a key to the symbols used. An explanation of acronyms may be found at the bottom of the page.

Routing

1. From Route 580 near Point San Quentin to Route 101 near Greenbrae.

   Post 1964 Signage History

   As initially defined in 1963, this segment was the entire route, and was defined as “Route 101 near Greenbrae to Route 17 near Point San Quentin.”

   In 1984, Chapter 409 reordered this segment and changed "Route 17" to "Route 580".

   Originally, this was to have been the "Point Reyes" Freeway. It was originally part of Route 17 from 1963 to the mid 1980's, when Route 17 was deleted in Marin County as part of the renumber of Route 17 to I-580 and I-880. The Pt. Reyes Freeway was one of many new routes created in the State Freeway and Expressway System, which was approved by the Legislature in 1959. This route has all but been killed by environmental concerns and costs. It would have connected with Route 37.

   In 2002, the Traversable Highways report showed this as "to be improved" in 5 years, but this appears to never have happened. The traversable route is Sir Francis Drake Road. There is a 4-lane section for 1.0 mile, and a 40' section for 0.5 mile. The existing underpass has only a 14' clearance. This is used as a cut-off between US 101 and the Richmond-San Rafael bridge.

   Pre 1964 Signage History

   This segment corresponds to pre-1963 LRN 251, defined in 1959. This is one of the few whose sign routes equals their pre-1963 legislative routes.

   Status

   This routing is unconstructed. For the US 101 to I-580 segment, the traversable route is Sir Francis Drake Blvd. The remainder of the traversable local routing includes Petaluma Pt. Reyes Road, and Nicasino Valley Road. These roads are not constructed to state standards. There are no plans for Caltrans to adopt this routing.

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2. From Route 101 near San Rafael to Route 1 near Point Reyes Station.

   Post 1964 Signage History

   In 1984, Chapter 409 added segment (b) as a result of a transfer from Route 17, giving: “(a) Route 580 near Point San Quentin to Route 101 near Greenbrae. (b) Route 101 near San Rafael to Route 1 near Point Reyes Station.”

   Pre 1964 Signage History

   This was a proposed (routing determined) segment of Route 17. It was part of LRN 69, defined in 1933. This appears to correspond to Francis Drake Blvd. There is an interchange with several flyover ramps at the junction with US 101; this may have been planning for a future freeway Route 251.

   Status

   This routing is unconstructed. For the US 101 to I-580 segment, the traversable route is Sir Francis Drake Blvd. The remainder of the traversable local routing includes Petaluma Pt. Reyes Road, and Nicasino Valley Road. These roads are not constructed to state standards. There are no plans for Caltrans to adopt this routing.

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Freeway

Scenic Route

Statistics

Pre-1964 Legislative Route

Acronyms and Explanations:

• "LRN" refers to the Pre-1964 Legislative Route Number. "US" refers to a US Shield signed route. "I" refers to an Eisenhower Interstate signed route. "Route" usually indicates a state shield signed route, but said route may be signed as US or I.
• Previous Federal Aid (pre-1992) categories: Federal Aid Interstate (FAI); Federal Aid Primary (FAP); Federal Aid Urban (FAU); and Federal Aid Secondary (FAS). Current Functional Classifications (used for aid purposes): Principal Arterial (PA); Minor Arterial (MA); Collector (Col); Rural Minor Collector/Local Road (RMC/LR). Note that ISTEA repealed the previous Federal-Aid System, effective in 1992, and established the functional classification system for all public roads.
• Other frequently used terms: California Transportation Commission (Commission or CTC), California Department of Transportation (Department or Caltrans), Regional Improvement Program (RIP), Interregional Improvement Program (IIP), State Transportation Improvement Program (STIP), State Highway Operation and Protection Program (SHOPP), Traffic Congestion Relief Program (TCRP), Clean Air and Transportation Improvement Act of 1990 (Proposition 116), High Speed Passenger Train Bond Program (Proposition 1A), Highway Safety, Traffic Reduction, Air Quality, and Port Security Bond Act of 2006 (Proposition 1B), Corridor Mobility Improvement Account (CMIA), State Route 99 Bond Program (RTE or SR 99), Local Bridge Seismic Retrofit Account (LBSRA), Trade Corridors Improvement Fund (TCIF), Highway-Railroad Crossing Safety Account (HRCSA), State-Local Partnership Program (SLPP), Environmental Phase (PA&ED), Design Phase (PS&E), Right of Way (R/W), Fiscal Year (FY), Active Transportation Program (ATP), Trade Corridor Enhancement Program (TCEP), Local Partnership Program (LPP), Local Streets and Roads Program (LSRP), Solutions for Congested Corridors Program (SCCP).

Route 250 Route 252

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