I-291 ends at an odd intersection at a stoplight, where it continues as Burnett Road, but I-291 east traffic can exit uninterrupted by way of a ramp to the turnpike.

However, drivers coming from the turnpike must deal with this traffic light, as a left turn across the intersection is required to get on I-291 west.

US 20 does not actually join with I-91, but rather this exit splits, left for the onramp to I-91 north, the right to continue on the US 20 access ramp.

The original planned alignment had the route turn in almost a perfect 90-degree angle onto Roosevelt Avenue, but industrial development (including the relocation of Smith & Wesson's corporate headquarters) had the highway turn more gently.

[3] The first section of the expressway that opened was from US 20/Route 20A to I-90 (Massachusetts Turnpike) in 1957; work on the freeway started up again in 1967, and the entire highway was completed in 1971.