The Northern California territory includes the counties of Del Norte, Siskiyou, Modoc, Humboldt, Trinity, Shasta, Lassen, Mendocino, Tehama, Plumas, Glenn, Butte, Lake Colusa, Sutter, Yuba, Sierra, Sonoma, Napa, Yolo, Placer, Nevada, Marin, Solano, Sacramento, El Dorado, San Francisco, San Mateo, Contra Costa, San Joaquin, Alameda, Amador, Calaveras, Alpine, Tuolumne, Santa Cruz, Santa Clara, Stanislaus, Mariposa, Mono, San Benito, Merced, Madera, Monterey, Kings, Fresno, Tulare, and Inyo.
GTT Regional Manager
Maribeth Forst
Phone: (720) 333-9600
[email protected]
Dealer
Advanced Traffic Products (ATP)
Phone: (425) 347-6208
Website: www.advancedtraffic.com