what route is the george washington bridge on
Interstate 95 (I-95) and U.S. Route 1/9 (US 1/9, composed of US 1 and US 9)
George Washington Bridge
 Interstate 95 (I-95) and U.S. Route 1/9 (US 1/9, composed of US 1 and US 9) cross the river via the bridge. 
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George Washington Bridge [SEP] Introduction
The New Jersey Turnpike (part of I-95) and U.S. Route 46 (US 46), which lie entirely within New Jersey, terminate halfway across the bridge at the state border with New York. At its eastern terminus in New York City, the bridge continues onto the Trans-Manhattan Expressway (part of I-95, connecting to the Cross Bronx Expressway).