Although NY 840 is signed as an east–west route, the reference markers along NY 840 are sequenced from the arterial concurrency northward, ending at the Halsey Road intersection, in violation of standard New York State Department of Transportation (NYSDOT) practice. NYSDOT also lists the mileposts along the route from east to west in its annual Traffic Volume Report, implying a north–south orientation; however, NY 840 is listed as an east–west route in the NYSDOT route log, listing its beginning terminus at CR 40 (Judd Road, now CR 840).