Take US Route 1 South to Washington Road (Mercer County Route 571). Turn right onto Washington Road. Travel approximately 2 1/2 miles until Washington Road intersects Nassau Street in downtown Princeton. Turn left onto Nassau Street. Bear left at the third traffic light, where Nassau Street runs into Route 206 (also called Stockton Street) heading toward Lawrenceville and Trenton. Turn right at the second traffic light, onto Elm Road (Elm Road becomes the Great Road). Travel for about three miles. Turn left into the Princeton Academy driveway after crossing Drake's Corner Road.