 Along Altamont Boulevard, NY 156 runs as a two-lane residential street, paralleling a railroad line into the town of Guilderland, changing the monikers of Altamont–Vorheesville Road.Changing to a more rural roadway, NY 156, bending southeast through Guilderland.NY 156 begins crossing through a more densely wooded area of Guilderland, soon reaching the junction with Gardner Road, where it is more residential.