As illustrated, the project limits for Study #2 (GWP 4016-21-00) include Highway 401 from 5 km west of County Road 41 / Centre Street to 8 km west of County Road 38 for a total length of approximately 34.5 km.
The project is located within the following municipalities: Town of Greater Napanee, Township of Loyalist, the County of Lennox and Addington, and the City of Kingston.
Study #1 (GWP 4022-21-00) will address current and future transportation needs by developing a plan for the following:
- Rehabilitation and/or replacement of 9 bridges and 3 culverts
- Determine the long-term interchange configuration for the following 3 Highway 401 locations:
-
- Shannonville Road Interchange
- Marysville Road Interchange
- Deseronto Road Interchange
- Establish the footprint for the interim six and ultimate eight lanes of Highway 401

As illustrated, the project limits for Study #2 (GWP 4016-21-00) include Highway 401 from 5 km west of County Road 41 / Centre Street to 8 km west of County Road 38 for a total length of approximately 34.5 km.
The project is located within the following municipalities: Town of Greater Napanee, Township of Loyalist, the County of Lennox and Addington, and the City of Kingston.

Study #2 (GWP 4016-21-00) will address current and future transportation needs by developing a plan for the following:
- Rehabilitation and / or replacement of 18 bridges and 3 culverts
- Determine the long-term interchange configuration for the following 4 Highway 401 locations:
-
- County Road 41 Interchange
- Palace Road Interchange
- Camden Road Interchange
- Old Milton Road Interchange
- Establish the footprint for the interim six and ultimate eight lanes of Highway 401
NOTE: The Ministry completed the Highway 401 Interchange Improvements at Palace Road Preliminary Design and Class Environmental Assessment Study (GWP 4197-13-00) in 2020. As the Palace Road structure already accommodates 8 lanes, it is not part of the current project scope for Study #2.
Other MTO Highway 401 Improvement Projects in Proximity
The current undertaking is one of several Highway 401 improvement projects initiated by the MTO to address existing and future needs of the corridor. Other ongoing area projects include the following:
Highway 401 Bridge Improvements at Collins Creek and Interchange/Bridge Improvements at Kingston Road 38 and Sydenham Road.
For more information, please visit: Hwy401KingstonBridgesEA.com
Highway 401 Planning Study, Brockville, GWP 4003-19-00
For more information, please visit:
www.highway401brockville.ca
Highway 401 Bridge Improvements in Eastern Ontario
For more information, please visit:
www.401bridgeimprovements.com
Highway 401 Improvements West of Maitland Road, G.W.P. 4024-20-00
For more information, please visit:
www.highway401PrescottMaitland.ca
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