As of May 2010, the borough had a total of 27.03 miles (43.50 km) of roadways, of which 23.99 miles (38.61 km) were maintained by the municipality, 0.15 miles (0.24 km) by Warren County and 2.89 miles (4.65 km) by the New Jersey Department of Transportation.

The main highways serving Washington are New Jersey Route 31 and New Jersey Route 57.
Route 31 travels north–south, while Route 57 is oriented east–west.
As of May 2010, the borough had a total of 27.03 miles (43.50 km) of roadways, of which 23.99 miles (38.61 km) were maintained by the municipality, 0.15 miles (0.24 km) by Warren County and 2.89 miles (4.65 km) by the New Jersey Department of Transportation.
The main highways serving Washington are New Jersey Route 31 and New Jersey Route 57. Route 31 travels north–south, while Route 57 is oriented east–west.
Washington, New Jersey