California Highway Patrol common codes:
104 = MESSAGE RECEIVED
106 = BUSY
1013 = ADVISE ROAD OR WEATHER CONDITIONS
1014 = PROVIDE ESCORT
1020 = LOCATION REQUESTED
1021 = TELEPHONE _________
1022 = DISREGARD
1023 = STANDBY
1031 = ATTEMPTED SUICIDE
1039 = MESSAGE OR ITEM DELIVERED
1097 = ON SCENE
1098 = ASSIGNMENT COMPLETED
1110 = TAKE A REPORT
1124 = ABANDONED VEHICLE
1125 = TRAFFIC HAZARD
1126 = DISABLED VEHICLE
1141 = AMBULANCE REQUIRED
1142 = PARAMEDICS REQUIRED
1144 = POSSIBLE FATALITY
1148 = PROVIDE TRANSPORTATION
1166 = DEFECTIVE TRAFFIC SIGNALS
1179 = ACCIDENT - AMBULANCE RESPONDING
1180 = ACCIDENT - MAJOR INJURY
1181 = ACCIDENT - MINOR INJURY
1182 = ACCIDENT - PROPERTY DAMAGE
1184 = TRAFFIC CONTROL
1185 = TOW TRUCK REQUIRED OR REQUESTED
1186 = BOMB THREAT
1187 = BOMB FOUND
1198 = MEET
20001 = FELONY HIT AND RUN ACCIDENT
20002 = MISDEMEANOR HIT AND RUN ACCIDENT
23103 = RECKLESS DRIVING
23152 = MISDEMEANOR - DRUNK DRIVING
23153 = FELONY - DRUNK DRIVING
3A = AAA (AMERICAN AUTOMOBILE ASSOCIATION)
911C = CELLULAR 911 CALL
More codes here...
http://cad.chp.ca.gov/htm/body_glossary.htm