Live Chat I-780 CA Community Nearby Traffic United States Post Office (Amenity postoffice) 2024-05-27 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to United States Post Office (Amenity Postoffice) Concord, CA 4.23 Walnut Creek, CA 5.25 Martinez, CA 6.41 Interstate highway exits close to United States Post Office (Amenity Postoffice) Exit 49, i680ca 1.49 Exit 50, i680ca 1.98 Exit 51, i680ca 2.17 Interstate highways close to United States Post Office (Amenity Postoffice) i680ca map 1.49 i780ca map 12.14 i80 map 17.60 State roads close to United States Post Office (Amenity Postoffice) 242 NORTHBOUND map 1.85 242 SOUTHBOUND map 1.85 CA 4 map 4.48