New York adopts mileage-based numbering for Interstate 81 exits
Source: NY State

The New York State Department of Transportation (NYDOT) has announced a significant change in the numbering system for exits along Interstate 81, starting with three counties in the middle of the state: Cortland, Oswego, and Onondaga.

This project aims to replace the current sequentially numbered exit signs with new panels that identify exits based on their mileage location along the highway. This update will also apply to Interstate 690 and State Route 481 within the same counties. The goal is to provide motorists with a clearer understanding of the distances they need to travel to reach their destinations, thereby improving traffic management and enhancing safety and emergency response capabilities, according to NYDOT.

Central New York is the first region in Upstate New York to transition to the mileage-based exit numbering system on I-81. Plans are in place to eventually update all exit signs along the interstate, stretching from the Pennsylvania border to the Canadian border, to this new system.

The new exit numbers on I-81 will be based on the distance in miles, moving from south to north, starting at the Pennsylvania border and extending to the Canadian border. Similarly, the redesigned exit numbers along I-690 will reflect the distance in miles from west to east, beginning at the New York State Thruway. The updated exit numbers for State Route 481 will also be based on mileage, moving from south to north, starting at I-481 (future I-81).

The work on converting the exit signs is expected to be completed by the end of 2024.

The new mile-based exit numbers will be added to the upper panel of the existing signs. To minimize driver confusion, supplementary signs with the old sequential exit number (e.g., OLD EXIT 9) will be placed at the bottom of the first approaching existing exit sign.

For instance, the current Exit 9 (Marathon) along I-81 northbound and southbound will be re-designated as Exit 38, as it is approximately 38 miles north of the Pennsylvania state line.

Motorists should expect multiple short-term lane closures to facilitate the sign work, leading to potential travel delays. It is advised that drivers plan for extra travel time during this period.

This transition is part of a broader effort by NYDOT to modernize and improve the state’s highway system, aiming for a more efficient and safer travel experience for all road users.