This is a map of former State Route 901 in Washington as it existed from 1971 to 1992 (west of Lake Sammamish) and in 1992 (east of Lake Sammamish). Email me if you would like a copy of the GIS data I created for the highways.
No machine-readable source provided. Own work assumed (based on copyright claims).
No machine-readable author provided. NE2 assumed (based on copyright claims).