There are 28 routes assigned to the "A" zone of the California Route Marker Program, which designates county routes in California. The "A" zone includes county highways in Lassen, Plumas, Shasta, Sisk
CR A12
CR A28 at SR 3 in Montague
California State Route 89
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State Route 89 is a state highway in the U.S. state of California that travels in the north–south direction, serving as a major thoroughfare for many mountain communities in the Sierra Nevada and the
California county routes in zone A
…route is in Plumas County. County Route A14 (CR A14), or Graeagle Johnsville Road, is a road in Plumas County, California, United States, connecting SR 89 in Graeagle to Main Street in Johnsville. Major junctions The entire route is in Plumas County…
SR 89 (South) briefly joins SR 49 (North) in Sierra County, an example of a wrong-way concurrency
SR 44 and SR 89 intersection
The northern end of SR 89 at Mt. Shasta