State Route 281
Click here for a key to the symbols used. An explanation of acronyms may be found at the bottom of the page.
From Route 29 south of Lakeport to Route 29 southerly of Konocti Bay and via the
vicinity of Soda Bay.
Post 1964 Signage History
In 1970, Chapter 1473 defined Route 281 as “Route 29 south of
Lakeport to Route 29 southerly of Konocti Bay and via the vicinity of Soda
In the Gribblenation Blog "California State Route 281", Tom Fearer notes:
Most Legislative Routes adopted under 1970 Legislative Chapter 1473
were contingent upon a local authority building an existing highway up
to State Standards before maintenance would be assumed. Route 281
appears in its current configuration on the 1975 Caltrans Map that
suggests that Lake County was only able to fund 3 miles of building Soda
Bay Road to State Standards. Soda Bay Road has been around for a
significant period of time as it can be seen on the 1917 California
Automobile Association Map; it was shown as a minor highway on a 1935
A discussion of the Highways to Boulevards program during the March 2022
CTC meeting identified the following segment(s) as potential Highways to
Boulevards conversion projects: Route 281 in Lake County.
(Source: March 2022 CTC Agenda, Agenda Item 4.3)
Route 281 has 3 constructed miles that appear in the Caltrans Post Mile
Tool as Post Mile LAK 14.0-17.0 on Soda Bay Road. Soda Bay Road northwest
to CA 29 more or less is the implied connection of CA 281 beyond State
Maintenance. This was improved to a state highway sometime back in the
1990s, as the traversable highways report discussed improvement of the
existing county road to state standards is planned for the distant
future (PM 13.2 through PM 14.0).
(Source: Gribblenation Blog "The Paper Highways north of San Francisco Bay; CA 12, CA 17, CA 37, CA 181, CA 251, and CA 281")
This routing is unconstructed from 3 mi NW of Route 29 south of
Lakeport to Konocti Bay (Konocti Bay Road), although Soda Bay Road and
County Road 502 appear to cover the route.
The 2013 Traversable Highways report notes that the segment from Route 29
south of Lakeport to Konocti Bay (14.0 mi) is unconstructed. The closest
is Soda Bay Road - Improvement of existing road to state standards is
planned for distant future by the county (PM 13.2-14.0).
The SAFETEA-LU act, enacted in August 2005 as the reauthorization of
TEA-21, provided the following expenditures on or near this route:
- High Priority Project #1085: Widen South Main St.-Soda Bay Rd.
(Route 281) between County Road 400A (mile marker 0. 0–mile marker
0.7) and County Road 502 (mile marker 0.0 and 0.9). $3,200,000.
Other WWW Links
Overall statistics for Route 281:
- Total Length (1995): 3 miles traversable; 14 miles unconstructed.
- Average Daily Traffic (1992): 3,850.
- Mileage Classification: Rural: 17; Sm. Urban: 0; Urbanized: 0.
- Previous Federal Aid Mileage: FAS: 3 mi.
- Functional Classification: Collector: 3 mi.
- Counties Traversed: Lake.
Pre-1964 Legislative Route
In 1959, Chapter 1062 defined LRN 281 as “[LRN 2] near the south
end of San Diego Bay to east of the United States Naval Auxiliary Air
Station, Brown Field”
In 1963, Chapter 1698 changed the east end to LRN 282, but that change
was overtaken by the Chapter 385 "great renumbering".
This is Route 117, currently numbered as Route 905 from I-5 near the S
end of San Diego Bay to E of Brown Field.
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).
© 1996-2020 Daniel P. Faigin.
Maintained by: Daniel P. Faigin