Duxbury Select Board Endorses Rotaries at Route 3/Route 3A Interchange

DUXBURY -- October 4, 2023, Duxbury Select Board backs rotary design at Route 3/Route 3A interchange after five-year crash review. The board endorsed a proposal from engineering firm Vanasse Associates following an intersection control evaluation at exit 20, formerly exit 10, where 26 crashes, six resulting in injuries, were recorded over the past five years. The firm's cost-benefit analysis rated roundabouts roughly two-to-one more cost-effective than traffic signals despite higher implementation costs, and all-way stops were eliminated from consideration for low efficacy. MassDOT will now decide whether to proceed and would be responsible for construction costs if it does; Duxbury and Kingston will split design and engineering expenses under a cost-sharing arrangement approved at a 2019 town meeting. The Highway Committee had already endorsed the rotary approach before Monday's Select Board vote.