Welcome to Caltrans District 4
D4 Icon


Check Current
Highway Conditions

Enter Highway Number(s)
You can also call


Office of Local Assistance | Directory

Office Directory

Street and Mailing Address

Local Agency Directory


Office Directory
Office of Local Assistance
District Local Assistance Engineer (DLAE) 510-286-5226
Office Fax   510-286-5229
Peninsula Region
STP/CMAQ, TE, STIP, XCH, State Programs Coordinator 510-622-5930
San Mateo County 510-622-5919
STIP, FTA, MTC, Prop 1B Bonds 510-286-5223
Santa Clara County 510-622-5909
San Francisco County 510-622-5910
SR2S, BTA, EEM Programs 510-622-5911
North Bay Region
ER, DBE, Training Programs 510-286-5236
Marin County 510-622-5917
DBE Program 510-622-5928
Solano County 510-286-5225
Napa County 510-286-5228
Sonoma County 510-622-5916
East Bay Region
SR2S, SRTS, HSIP, HR3 Programs Coordinator 510-286-6485
Alameda County 510-286-6372
Alameda County 510-286-5237
Contra Costa County 510-622-5921
Contra Costa County 510-622-5914
SR2S, BTA, EEM Programs 510-622-5911
Bridge & Structures
HBP, Seismic Retrofit Program Coordinator 510-286-5227
San Francisco, San Mateo, Contra Costa, Sonoma County; PJPB 510-286-5607
Marin, Napa, Solano, Sonoma County; BART; SFIA 510-622-5918
Santa Clara, Alameda County; GGBHTD 510-622-5929
Santa Clara, Alameda County 510-286-5222
Invoices, QAP 510-622-5922
Project Support, Purchases 510-286-5240
Hydraulics, Discretionary Programs 510-286-5232
Construction Oversight 510-622-5493
NEPA Delegation 510-286-5235
Environmental Support I
Environmental Branch Chief 510-286-5530
Santa Clara, Alameda, Napa County 510-622-8790
Environmental Support II
Environmental Branch Chief 510-286-6371
Training & Environmental Status 510-286-5233
Contra Costa, Solano, Marin County 510-286-5250
Sonoma, San Francisco, San Mateo County 510-286-5743
Natural Science 510-622-1748
Archeology 510-622-1640


Street and Mailing Address
Office Street Address Mailing Address
District 4 Office of Local Assistance 111 Grand Avenue, Oakland P.O. Box 23660, MS 10-B, Oakland, CA 94623
Office of Local Programs - HQ 1120 N Street, Sacramento P.O. Box 942873, Sacramento, CA 94274
Office of Local Programs - Accounting 1050 20th Street, Sacramento P.O. Box 942874, Sacramento, CA 94274
Office of Local Programs - Audit 1050 20th Street, Sacramento P.O. Box 942873, Sacramento, CA 94274



This directory of city county and regional agencies can be either viewed or downloaded for desk use. Requires Adobe Acrobat Reader.