Live Chat I-680 CA Community Nearby Traffic United States Post Office (Amenity postoffice) 2024-05-30 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to United States Post Office (Amenity Postoffice) Pleasant Hill, CA 6.41 Concord, CA 6.74 Port Costa, CA 8.22 Interstate highway exits close to United States Post Office (Amenity Postoffice) Exit 54, i680ca 2.79 Exit 56, i680ca 2.95 Exit 53a, i680ca 5.14 Interstate highways close to United States Post Office (Amenity Postoffice) i680ca map 2.79 i780ca map 5.93 i80 map 11.53 State roads close to United States Post Office (Amenity Postoffice) CA 4 map 0.31 242 SOUTHBOUND map 6.64 242 NORTHBOUND map 6.67