From: lesatz@usc.edu (Eric Michals)
Newsgroups: alt.radio.scanner
Subject: Caltrans Frequencies (was LA Area Traffic info)
Date: 30 Jul 1992 18:56:44 -0700
Organization: University of Southern California, Los Angeles, CA
Distribution: usa
NNTP-Posting-Host: aludra.usc.edu
Keywords: Traffic

If this doesn't interest you, sorry about posting it all over the US,
but I figure a lot of people come to California and might want to
know.

Anyway, Caltrans traffic operations monitors all freeway and state
highway conditions throughout the state. They use the following
frequencies:

47.02 MHz (White)   Districts 04 North, 07 South & Headquarters
47.04 MHz (Black)   Districts 03 & 04 Local, 09, 11 & HQ
47.06 MHz (Brown)   Districts 04 South & HQ
47.08 MHz (Orange)  Local System State-wide and HQ
47.10 MHz (Yellow)  Districts 02, 10, 11 & HQ
47.12 MHz (Blue)    District 07 North & HQ
47.16 MHz (Grey)    Districts 03, 08 & HQ
47.18 MHz (Purple)  District 05 & HQ
47.20 MHz (Red)     Districts 01, 06 & HQ
47.24 MHz (Green)   District 07

I'm not real sure about the Northern Districts (1-5), but the Southern
Ones are as follows:

HQ = Headquarters in Sacramento
06 = Bakersfield/Fresno (Kern)
07 = LA/Ventura/Orange (see below)
08 = San Bernardino/Eastern Area
09 = Riverside??
10 = Southeastern Area?
11 = San Diego
12 = Orange County

The list I have was published before District 12 existed. 12 used to
be part of 7, so I would assume that Orange probably uses White (LA
South). According to Traffic Ops, most of the traffic stuff will be on
Green. Other frequencies are Construction and Accident clean-up crews.

I also believe that most of these are on State-wide repeaters. In my
experience driving state cars, I have been in Ventura and clearly
heard construction crews on I-105. Anyway, do a little listening and
let me know if I can find out anything else for ya.

Just for your interest, here are the State 10-Codes:

10-0 Time Check
10-1 Poor Reception
10-2 Good Reception
10-3 Change Frequency
10-4 Message Received
10-5 Relay message
10-6 Busy
10-7 Out-of-service
10-8 In-service
10-9 Repeat Transmission
10-10 Off Duty
10-13 Advise road and weather conditions
10-19 Return or report to ___________
10-20 Location
10-21 Telephone __________________
10-22 Disregard Message or Assignment
10-23 Stand By
10-30 Improper Radio Traffic
10-32 Dead Animal
10-39 Message or item delivered
10-44 Traffic Check
10-45 Negative traffic
10-51 Advise if __________ is available for a land line
10-97 Arrived at location
10-98 Assignment completed, available
11-24 Abandoned Vehicle
11-25 Traffic Hazard (vehicle or object)
11-26 Disabled Vehicle (Occupied)
11-41 Ambulance Required
11-80 Accident with Major injuries
11-81 Accident with Minor injuries
11-82 Accident, property damage
11-83 Accident, no details
11-85 Tow Truck
"Emergency" - Emergency

Sorry about the single column, but I didn't feel like formatting it.

Eric
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|__Eric Michals____________/\_[][]}  I've got seven in the clip and one      |
|  lesatz@alcor.usc.edu    \/ [][]}  in the chamber. Will that be enough??   |
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