San Joaquin/Alameda/Contra Costa
County Sign Route J4
[Click here for a key to the symbols used.
Some county routes were constructed with federal funds.
These routes are indicated as FAP (Federal Aid Primary), FAU (Federal Aid Urban), or FAS (Federal Aid Secondary).
If no funding source is shown, no federal funds were used.
Note that while some segments seem to have the same attributes,
they may differ in the county-local road number assigned to the segment,
or in the Caltrans Map Sheet number.]
Durham Ferry Road from Airport Way (County Sign Route J3) to Kasson Road (FAS, 0.20 mi) [San Joaquin
Kasson Road from Durham Ferry Road to Eleventh Street (7.25 mi) [San
Grant Line Road from Eleventh Street to the Tracy city limits (FAS, 3.09
mi) [San Joaquin County]
This segment, from Eleventh Street to G Street in Banta was part of the Lincoln Trail.
Grant Line Road in Tracy (FAU, 1.75 mi) [San Joaquin County]
Grant Line Road from the Tracy city limits to Byron Highway (FAS, 2.47
mi) [San Joaquin County]
Highway from Grant Line Road to the Alameda county line (FAS, 5.00 mi) [San Joaquin County]
Note: This segment was once part of US 48, later US 50.
Byron Bethany Road from the San Joaquin county line to the Contra Costa
county line (FAS, 1.41 mi) [Alameda County]
Byron Highway from the Alameda county line to Route 4 (FAS, 6.82 mi)
[Contra Costa County]
According to reports, this segment may have been decommissioned, as the
signs have been removed (02/2000). However, as of 2005, the Contra Costa
County installed brand new signs along Byron Highway, marking it as J4.
History and Signage Information
This route was defined in 1960.
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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 Note that ISTEA repealed the previous Federal-Aid System, effective in 1992, and established the functional classification system for all public roads.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