The 11 code, similar to the APCO 10 code is a system of numeric codes devised
by the California Highway Patrol to communicate situations unique or frequent
to the work of the CHP.
It is also used in conjunction with the ten-code and
other voice radio protocols. Other agencies also use it or have adapted it to
better suit their specific area.
Disclaimer: The list is intended to show the most common codes and help
provide an estimate of the code's definition. These codes can vary between
Cities, Counties and States, therefore we can not guarantee their accuracy.