Exit numbering on I-86 was that of the road's predecessor, Route 15, in a sequence beginning on New York's Hutchinson River Parkway.
Connecticut | Hartford, Connecticut | New Haven, Connecticut | Interstate 75 | Interstate 90 | Interstate 5 | University of Connecticut | Interstate 94 | Interstate 81 | Interstate 80 | Interstate 70 | Greenwich, Connecticut | Interstate 40 | Bridgeport, Connecticut | Stamford, Connecticut | Interstate 95 | Norwalk, Connecticut | Interstate 10 | New London, Connecticut | Interstate 65 | Interstate 64 | Interstate 44 | Interstate 90 in Minnesota | Connecticut River | Interstate 71 | Interstate 35 | Mystic, Connecticut | Interstate 15 | Norwich, Connecticut | Interstate 476 |
In 1963, however, the state proposed the corridor as the Cedar Ridge Connector with no number, leading from its current terminus at I-84 to U.S. 5/Route 15 in Wethersfield.