As of May 2010, the borough had a total of 10.89 miles (17.53 km) of roadways, of which 7.84 miles (12.62 km) were maintained by the municipality, 1.36 miles (2.19 km) by Hunterdon County and 1.69 miles (2.72 km) by the New Jersey Department of Transportation.

New Jersey Route 31 is the main highway through Glen Gardner.
As of May 2010, the borough had a total of 10.89 miles (17.53 km) of roadways, of which 7.84 miles (12.62 km) were maintained by the municipality, 1.36 miles (2.19 km) by Hunterdon County and 1.69 miles (2.72 km) by the New Jersey Department of Transportation.
New Jersey Route 31 is the main highway through Glen Gardner.
Glen Gardner, New Jersey