Allston I90 Throat & History HandoutAllston I90 Throat & History Handout Handout on the history of the Charles River Throat area and recommendations for mitigation. This was distributed to members in advance of the Allston I-90 Task Force meeting on June 27, 2018. Click to view the Allston I-90 Throat & History (PDF) compiled by WalkBoston’s Bob Sloane