I-80 East - Exit 33
I-80 east at Exit 33 - CA-37/Napa/Novato/Auto Mall/Columbus Parkway. I-80 east continues to Sacramento.
I-80 West - Exit 33
I-80 west at Exit 33 - CA-37/Novato/San Rafael. CA-37 crosses the north end of San Pablo Bay, connecting US-101 (Novato) and I-80 (Vallejo).
End CA-37 East at I-80 and Columbus Parkway
End CA-37 East at I-80 West/San Francisco and Exit 21B - Auto Mall/Columbus Parkway. Use left lanes for I-80 East to Sacramento.