 In 1962, however, the MassDPW conducted traffic studies on the two bridges crossing the canal and found that the Sagamore Bridge was above vehicular capacity, whereas the more southern Bourne Bridge had excess capacity.The Route 25 freeway was then redesigned to cross over the Bourne Bridge and connect with the Mid-Cape Highway (US 6) on the southern side of the canal via the proposed Southside Connector.The connector would have been constructed through the Massachusetts Military Reservation in Bourne, but was canceled by the MassDPW and MassHighway in 1977 when environmental tests indicated the freeway would disturb underground aquifers serving as water sources for the region.