Interstate 238, Interstate 580, and Interstate 880 in San Lorenzo

Northbound mileage on Interstate 880 in San Lorenzo, California

This sign on northbound Interstate 880 in San Lorenzo might be slightly misleading. The interchange with Interstate 238 is one mile to the north, but, technically speaking, it's not the junction with Interstate 580. Interstate 238 actually connects the two Interstates over about a three-mile route.

Also note the mounting of this sign on an overpass, something that's fairly common in California.