Under this plan, I-83 was expected to act mostly as a northerly spur to and from the CBD, and as an easterly spur to and from the CBD; through traffic was expected to be a small proportion of the total amount making use of the route. I-83's terminus at I-95 would have been a full 3-way freeway-to-freeway interchange, with a full complement of ramps provided for access to and from Boston Street and O'Donnell Street. When construction began on I-95 through East Baltimore in the mid-1970s, a short six-lane section was built within the vicinity of the planned I-83 interchange. This was done in anticipation of I-83 connecting the CBD to I-95, the rest of which carries at least eight lanes of traffic throughout the city.