Route Description
Interstate 291 begins as a spur of Interstate 91 at Exit 8 in Springfield, concurrent with U.S. 20, which merges from the north. The two entry ramps from I-91 merge with each other after Exits 2A and 2B, where a sign for the beginning of I-291 east is posted. I-291 and U.S. 20 run eastbound concurrently until Exit 5A (U.S. 20 joins westbound at Exit 5), where U.S. 20 east leaves the highway for a junction with Route 20A. I-291 continues east into Chicopee, where it meets its eastern end at Exit 7, the interchange with the Massachusetts Turnpike (Interstate 90). This is an odd intersection; the mainline of I-291 ends at a stoplight, but I-291 east traffic can exit uninterrupted by way of a ramp to the Mass Pike. However, drivers coming from the Mass Pike must deal with this traffic light, as a left turn across the intersection is required to get on I-291 west.
The westbound interchange with I-91 is unusual in that the ramps for Exit 1A-B split before the ramps for Exits 2A-B do. Traffic bound for Exit 2A (Chestnut Street) must first take the ramp for Exit 1A (I-91 South), and traffic bound for Exit 2B (Dwight St.) must first take the ramp for Exit 1B (I-91 North).
Traffic bound for U.S. 20 West from I-291 takes Exit 1B. U.S. 20 does not actually join with I-91, but rather this exit splits, left for the on-ramp to I-91 North, the right to continue on the U.S. 20 access ramp.
Read more about this topic: Interstate 291 (Massachusetts)
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