Hillside Avenue - Route Description - Nassau County

Nassau County

At the county line, NY 25B breaks from its previous east-northeast alignment and takes a more pronounced northeast routing through New Hyde Park. The road narrows as well, decreasing to four lanes excluding the center turning lane, with an extended shoulder taking the place of the two lost lanes. A half-mile from the county line, NY 25B enters North New Hyde Park, intersecting Lakeville Road in the center. Two blocks from Lakeville, the commercial buildings give way to residential dwellings for seven blocks before returning at the intersection of New Hyde Park Road and Hillside Avenue.

Past New Hyde Park Road, the buildings surrounding NY 25B become a balanced mix of commercial and residential structures. Less than a quarter of a mile from New Hyde Park Road, the road makes a turn eastward, passing to the north of the Hillside Public Library as it curves to the right. After three blocks of homes, a flurry of businesses precede a junction with Marcus Avenue, formerly part of NY 25C. The commercial presence continues for two blocks eastward before shifting back to residential structures. The four-lane NY 25B, along with a separate, parallel Hillside Avenue South, continue eastward through blocks of primarily homes to Herricks Road, where the composition of structures along NY 25B becomes a mix of commercial buildings and residential dwellings once more. Hillside Avenue continues on, entering Williston Park. On the eastern edge of the village, NY 25B narrows to two lanes as it crosses the Oyster Bay Branch of the Long Island Rail Road and enters East Williston, where the surroundings shift to residential for the final time.

In the center of the village, NY 25B intersects Roslyn Road before passing by the North Side School two blocks to the east. Roughly a half-mile from the school, NY 25B enters the village of Old Westbury and passes over the eight-lane Northern State Parkway with no connection between the two. The missing link is filled by way of Glen Cove Road, which NY 25B intersects a mere 150 yards (140 m) from the parkway, and Jericho Turnpike (NY 25), accessible via Glen Cove Road. East of Glen Cove Road, NY 25B enters Westbury and begins to develop a large median in preparation for an interchange with NY 25 roughly 0.3 miles (0.5 km) to the east. Just west of the interchange, NY 25B intersects Bacon Road. 100 yards (91 m) from the intersection, NY 25B crosses over NY 25 west and enters the median of NY 25 prior to merging with NY 25 east, ending the NY 25B designation.