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The official California Highway Patrol website is www.chp.ca.gov

CHP Computer Aided Dispatch - This is the CHP's web site where you can locate near real time information on working incidents.

CHP Abbreviations - What's an 11-85? Now you can find out by looking up codes and abbreviations commonly used by the CHP.

CHP Radio Frequencies
Channel	Base	Mobile
Tac-1	44.86	44.86
Tac-2	45.94	45.94
Tac-3	44.94	44.94
Tac-4	45.02	45.02
Tac-5	45.06	45.06
Tac-6	39.92	39.92
Border Tac	39.92	42.64
Amber	42.08	42.82
Amber-2	42.08	42.76
Aqua	42.62	42.84
Beige-1	39.88	42.08
Black	42.46	42.70
Blue	42.34	42.18
Blue-1	39.14	42.18
Bronze	42.12	42.40
Brown	42.50	42.82
Copper	42.60	42.74
Copper-1	39.26	42.74
Emerald	42.88	42.20
Gold	42.12	42.20
Gold-1	39.60	42.20
Grape	42.42	42.66
Gray	42.48	42.68
Gray-1	39.72	42.68
Green	42.54	42.24
Green-1	39.36	42.24
Ivory	45.02	45.02
Maroon	42.92	42.74
Maroon-1	42.92	42.64
Orange	42.88	42.66
Orange-1	39.40	42.66
Pink	42.44	42.76
Purple	42.40	42.16
Purple-1	39.44	42.16
Red	42.44	42.28
Ruby	42.50	42.28
Silver	42.08	42.28
Tan	42.42	42.84
Tan-1	39.80	42.84
Teal	42.36	42.78
Turquoise	42.60	42.02
Turquoise-1	39.68	42.02
Violet	42.16	42.64
White	42.56	42.72
Yellow	42.52	42.30

CHP PL Tones
Division	PL Tone
1 Northern	107.2
2 Valley	179.9
3 Golden Gate	131.8
4 Central	146.2
5 Southern	192.8
6 Border	162.2
7 Coastal	167.9
8 Inland	118.8

CHP Extender and Misc Frequencies
Description	Frequency	Tone
1 Car to Station	154.9050	173.8
2 Car to Car	154.9050	186.2
	154.9050	156.7
3 No PL Direct	154.9050
4 CLEMARS	154.9200
5 CALCORD	156.0750
6 NLEMARS	155.4750
NOTES:1. Plumas County uses 155.4450 in place of 154.9050 2. Susanville Dispatch (ROSE) has been know to use 153.9350 for their extender when having interference problems with 155.4450

Mutual Aid Channels
Description	Frequency
GOLD-1 CLEMARS	154.9200
GOLD 2 CLEMARS	154.9350
GOLD-3 NLEMARS	155.4750
GOLD-6 CLEMARS	39.4600
GOLD-7 CLEMARS	45.8600
GOLD 12 CLEMARS	39.1000

Aircraft
Description	Frequency
BLUE	42.3400
IVORY	45.0200
VHF (Primary)	122.8500
VHF (Secondary)	122.8750
Helicopter Air to Air	123.0250
Fixed Wing Air to Air	122.7500

State Building Security, VIP Protection & Law Enforcement Liaison
Description	Frequency
Ch 1 Operations 1	460.3750
Ch 2 Operations 2	460.4500
Ch 3 Operations 3	453.8350
Ch 4 Operations 4	453.8500
Ch 5 Tactical 1	460.0875
Ch 6 Tactical 2	460.2125
Ch 7 Tactical 3	460.3375

Special Units
5000	Governor
5001	Lt. Governor
5049	Governor's Driver
5050	Lt. Governor's Driver
5100-98	Office of Emergency Services
5200-98	American Red Cross
5400-98	U.S. Military Services
5555	Emergency Command Post
5600-98	Department of Justice
5700-98	Department of Justice
5826	National Auto Theft Bureau
5836-7	LASO prisoner transportation
5838-9	SDSO prisoner transportation
5841	SDSO "RACES ONE"
5851-60	California Youth Authority
5871	Riverside SO command post
5872	San Bernardino SO command post
5873	Orange SO command post
8800-98	Central services
CHP-1	CHP Commissioner
CHP-2	CHP Deputy Commissioner

CHP and Trunked Radio
I've received many questions regarding the CHP's plans to move to a trunked radio system and when this might happen. I hope this will help clear things up. For the past several years (posted 5/2001), the State of California has been studying the potential of a statewide trunked radio system that would serve the State's ten largest public-safety agencies, and perhaps be available for participation by local similar local agencies. The ten Departments and agencies that participated in the study are: California Highway Patrol Corrections Fish and Game Forestry and Fire Protection Justice Parks and Recreation Transportation Water Resources Youth Authority Office of Emergency Services The system would be based on a hybrid combination of VHF-HB channels and 800 MHz channels (the State considers that the 800 MHz band includes the entire range from 741 MHz to 869 MHz). 800 MHz has significantly less propagation range than VHF-HB, and would be used in the metropolitan and more-developed areas, where a relatively dense network of base stations is necessary and practical. VHF-HB would be used in the rural areas, where its superior range is valuable, and where the terrain and sparser population would make 800 MHz costly and impractical. The entire UHF land-mobile band, i.e., from 406MHz (including military frequencies) through 869MHz, is under consideration for the hybrid system. Trunking would be used for the areas covered by UHF channels. In the VHF-HB areas, some may be trunked, and the most remote areas would use conventional channels. The system would be based on digital transmission. A plan has been approved for a four-year pilot project that will provide a joint trunked radio system to serve several counties in the Sacramento area. Further, the Division of Telecommunications is continuing to study current and evaluate technologies other than Project 25, specifically TETRA and the MA/COM digital radio product, now being planned for a statewide system in Pennsylvania.

CHP and Trunked Radio

I've received many questions regarding the CHP's plans to move to a trunked radio system and when this might happen. I hope this will help clear things up. For the past several years (posted 5/2001), the State of California has been studying the potential of a statewide trunked radio system that would serve the State's ten largest public-safety agencies, and perhaps be available for participation by local similar local agencies. The ten Departments and agencies that participated in the study are:

California Highway Patrol
Corrections
Fish and Game
Forestry and Fire Protection
Justice
Parks and Recreation
Transportation
Water Resources
Youth Authority
Office of Emergency Services

The system would be based on a hybrid combination of VHF-HB channels and 800 MHz channels (the State considers that the 800 MHz band includes the entire range from 741 MHz to 869 MHz). 800 MHz has significantly less propagation range than VHF-HB, and would be used in the metropolitan and more-developed areas, where a relatively dense network of base stations is necessary and practical. VHF-HB would be used in the rural areas, where its superior range is valuable, and where the terrain and sparser population would make 800 MHz costly and impractical. The entire UHF land-mobile band, i.e., from 406MHz (including military frequencies) through 869MHz, is under consideration for the hybrid system. Trunking would be used for the areas covered by UHF channels. In the VHF-HB areas, some may be trunked, and the most remote areas would use conventional channels. The system would be based on digital transmission. A plan has been approved for a four-year pilot project that will provide a joint trunked radio system to serve several counties in the Sacramento area. Further, the Division of Telecommunications is continuing to study current and evaluate technologies other than Project 25, specifically TETRA and the MA/COM digital radio product, now being planned for a statewide system in Pennsylvania.

Click on the map to jump to the frequencies for that area

Mobiles repeated on base frequency.

101 Northern Division - Redding

HUMBOLDT DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Crescent City	120	95	Green	42.54	42.24	107.2
Humboldt	125	16	Green	42.54	42.24	107.2
Garberville	126	105	Green	42.54	42.24	107.2

REDDING DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Red Bluff	130	36	Red	42.44	42.28	107.2
Cottonwood Inspection Facility	131		Red	42.44	42.28	107.2
Redding	135	37	Red	42.44	42.28	107.2
Trinity River	175	90	Red	42.44	42.28	107.2

SUSAN VILLE DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Susanville	140	38	Amber-2	42.08	42.76	107.2
Quincy	165	20	Amber-2	42.08	42.76	107.2
Alturas	170	60	Amber-2	42.08	42.76	107.2

YREKA DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Yreka	145	41	Purple	42.40	42.16	107.2
Mt. Shasta	146	52	Purple	42.40	42.16	107.2
Dunsmuir Grade Insp. Facility	147	84	Purple	42.40	42.16	107.2

UKIAH DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Ukiah	150	18	White	42.56	42.72	107.2
Clear Lake	151	7	White	42.56	42.72	107.2
Williams*	155	39	White	42.56	42.72	107.2
Willows*	160	93	White	42.56	42.72	107.2
* Williams and Willows are dispatched by Chico

201 Valley Division - Sacramento

SACRAMENTO DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Sacramento Comm Center	214	107
Auburn	220	45	Green	42.54	42.24	179.9
Grass Valley	230	42	Green	42.54	42.24	179.9
Placerville	245	44	Green	42.54	42.24	179.9
North Sacramento	250	46	Gold	42.12	42.20	179.9
South Sacramento	252	112	Black	42.46	42.70	179.9
Woodland	280	47	Black	42.46	42.70	179.9

TRUCKEE DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Gold Run	221	70	Gray	42.48	42.68	179.9
Truckee	222	80	Gray	42.48	42.68	179.9
Donner Pass Inspection Facility	223	109	Gray	42.48	42.68	179.9
South Lake Tahoe	246	13	Gray	42.48	42.68	179.9

CHICO DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Oroville	240	35	Brown	42.50	42.82	179.9
Chico	241	104	Brown	42.50	42.82	179.9
Yuba-Sutter	285	43	Brown	42.50	42.82	179.9

STOCKTON DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
San Andreas	255	49	White	42.56	42.72	179.9
Stockton	265	62	White	42.56	42.72	179.9
Tracy	266	103	White	42.56	42.72	179.9
Amador	295	94	White	42.56	42.72	179.9

301 Golden Gate Division - Vallejo

GOLDEN GATE COMMUNICATIONS CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Golden Gate Comm Center	318	119
Contra Costa	320	19	Maroon	42.92	42.74	131.8
Napa	325	21	Grape	42.42	42.66	131.8
Redwood City	330	91	Amber	42.08	42.82	131.8
San Francisco	335	32	Pink	42.44	42.76	131.8
San Jose	340	24	Ruby	42.50	42.28	131.8
West San Jose	340	119	Ruby	42.50	42.28	131.8
Hayward	345	25	Aqua	42.62	42.84	131.8
Nimitz Inspection Facility	347	126	Aqua	42.62	42.84	131.8
Marin	350	34	Violet	42.16	42.64	131.8
Santa Rosa	360	17	Emerald	42.88	42.20	131.8
Solano	365	22	Turquoise	42.60	42.02	131.8
Cordelia Inspection Facility	366	127	Turquoise	42.60	42.02	131.8
Oakland	370	96	Bronze	42.12	42.40	131.8
Dublin	390	118	Aqua	42.62	42.84	131.8
Mission Grade Inspection Facility	391		Aqua	42.62	42.84	131.8

401 Central Division - Fresno

BAKERSFIELD DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Bakersfield	420	69	Brown	42.50	42.82	146.2
Grapevine Inspection Facility	424	129	Turquoise	42.60	42.02	146.2
Buttonwillow	426	117	Turquoise	42.60	42.02	146.2
Fort Tejon	430	102	Turquoise	42.60	42.02	146.2

FRESNO DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Fresno	435	65	Silver	42.08	42.28	146.2
Hanford	440	68	Pink	42.44	42.76	146.2
Visalia	480	67	Pink	42.44	42.76	146.2
Porterville	481	40	Pink	42.44	42.76	146.2
Coalinga	495	88	Pink	42.44	42.76	146.2

MERCED DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Sonora	425	61	Yellow	42.52	42.30	146.2
Madera	450	66	Orange	42.88	42.66	146.2
Mariposa	455	63	Orange	42.88	42.66	146.2
Oakhurst	456	63	Orange	42.88	42.66	146.2
Merced	460	64	Orange	42.88	42.66	146.2
Los Banos	461	30	Orange	42.88	42.66	146.2
Modesto	465	48	Yellow	42.52	42.30	146.2
Chowchilla River Insp. Facility	464	140	Orange	42.88	42.66	146.2

501 Southern Division - Los Angeles

LOS ANGELES COMMUNICATIONS CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Los Angeles Comm Center	514	5
Baldwin Park	525	81	Orange	42.88	42.66	192.8
South Los Angeles	530	77	White	42.56	42.72	192.8
East Los Angeles	535	82	Yellow	42.52	42.30	192.8
Newhall	540	78	Tan	42.42	42.84	192.8
Castaic Inspection Facility	541	130	Tan	42.42	42.84	192.8
Antelope Valley	545	89	Tan	42.42	42.84	192.8
Santa Fe Springs	550	83	Gold	42.12	42.20	192.8
West Los Angeles	565	79	Pink	42.44	42.76	192.8
Altadena	575	98	Brown	42.50	42.82	192.8
West Valley	580	56	Teal	42.36	42.78	192.8
Central Los Angeles	590	15	Black	42.46	42.70	192.8
Central Los Angeles (secondary)	590	15	Peach-1	39.34	42.26	192.8

Los Angeles / Orange County Detail Map

Click map for larger image

601 Border Division - San Diego

EL CENTRO DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Winterhaven	620	116	Maroon-1	42.92	42.64	162.2
El Centro	625	85	Maroon-1	42.92	42.64	162.2
Calexico Inspection Facility	626	141	Maroon-1	42.92	42.64	162.2

BORDER COMMUNICATIONS CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Border Communications Center	618
San Diego	645	87	Orange-1	39.40	42.66	162.2
Otay Mesa Inspection Facility	646	142	Orange-1	39.40	42.66	162.2
Oceanside	650	92	Tan-1	39.80	42.84	162.2
San Onofre Inspection Facility	651	132	Tan-1	39.80	42.84	162.2
El Cajon*	680	108	Gold-1	39.60	42.20	162.2
Temecula	685	115	Tan-1	39.80	42.84	162.2
Rainbow Inspection Facility	686	134	Tan-1	39.80	42.84	162.2
Border Air Operations	122
*El Cajon is on the Regional Communications System. See the San Diego County page for more information.

INDIO DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Indio	630	76	Red	42.44	42.28	162.2
San Gorgonio Pass	655	97	Red	42.44	42.28	162.2
Desert Hills Inspection Facility	656	131	Red	42.44	42.28	162.2
Blythe	660	6	Red	42.44	42.28	162.2

ORANGE COUNTY COMMUNICATIONS CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Orange Communications Center	676	138
Santa Ana	675	86	Purple-1	39.44	42.16	162.2
Capistrano	690	113	Green-1	39.36	42.24	162.2
Westminster	670	55	Gray-1	39.72	42.68	162.2

701 Costal Division - San Luis Obispo

MONTEREY DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Santa Cruz	720	26	Green	42.54	42.24	167.9
Hollister-Gilroy	725	23	Green	42.54	42.24	167.9
Gilroy Inspection Facility	726	135	Green	42.54	42.24	167.9
Monterey	730	27	Black	42.46	42.70	167.9
King City	735	8	Black	42.46	42.70	167.9

SAN LUIS OBISPO DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Templeton	740	9	White	42.56	42.72	167.9
San Luis Obispo	745	28	White	42.56	42.72	167.9
Santa Maria	750	14	White	42.56	42.72	167.9
Buellton	755	3	White	42.56	42.72	167.9

VENTURA DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Santa Barbara	760	29	Green	42.54	42.24	167.9
Ventura	765	31	Purple	42.40	42.16	167.9
Conejo Inspection Facility	766	137	Purple	42.40	42.16	167.9

801 Inland Division - San Bernardino

INLAND COMMUNICATIONS CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Inland Communications Center	818	125
Riverside	840	74	Turquise-1	39.68	42.02	118.8
Rancho Cucamonga	855	123	Beige-1	39.88	42.08	118.8
San Bernardino	860	75	Copper-1	39.26	42.74	118.8
Arrowhead	865	101	Copper-1	39.26	42.74	118.8

BISHOP DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Bridgeport	820	71	Gold	42.12	42.20	118.8
Bishop	825	72	Gold	42.12	42.20	118.8
Mojave	830	59	Gold	42.12	42.20	118.8

BARSTOW DISPATCH CENTER
Location	Office	Units	Channel	Base	Mobile	Tone
Needles	834	114	White	42.56	42.72	118.8
Barstow	835	73	White	42.56	42.72	118.8
Victorville	850	12	White	42.56	42.72	118.8
Morongo Basin	870	106	White	42.56	42.72	118.8

Special thanks to Ed Greany for contributing the CHP/CALTRANs map.

Special thanks to Mike for contributing information and corrections.

Special thanks to the folks of the ScanNorCal Yahoo Group for contributing information.

Special thanks to the folks of the SoCalScan Yahoo Group for contributing information.

Special thanks to the State of California and the California Highway Patrol.