Both NY 156 and NY 146 are marked with signs directing traffic to the other route by way of this one block of Main Street. NY 146 heads east from Maple Avenue, following Main Street eastward out of the village. After leaving Altamont, NY 146 continues for about  through a lightly populated portion of Guilderland before intersecting with the southern terminus of NY 158.
NY 156 and NY 146 are marked with signs directing traffic to each other via a single block of Main Street. NY 146 travels east from Maple Avenue, following Main Street eastward out of the village. After leaving Altamont, NY 146 continues for approximately through a sparsely populated area of Guilderland before intersecting with the southern terminus of NY 158.