NORTHAMPTON — Construction to the northbound side of I-91 will close the Exit 20 on-ramp in on Thursday and Friday, the Massachusetts Department of Transportation announced on Wednesday.
The on-ramp will be closed Thursday and Friday between 9 a.m. and 3 p.m.
Drivers traveling north on I-91 are advised to use Route 5 to access the Exit 21 on-ramp. Detour signs will be posted, and drivers are encouraged to drive slowly with caution in construction zones.