was replaced by Massachusetts Route 23, U.S. Route 7, U.S. Route 44, and Connecticut Route 2. Route 18 Route 18, designated the Crawford Notch Way, began at Route 12 and Route 14 in Montpelier, Vermont. The three highways passed through the state capital, then Route 14 split southeast toward Barre and Route 12 split north for Hardwick. Route 18 headed northeast and joined Route 15 at Danville to run through St. Johnsbury, where the highways intersected Route 2. East of town, Route 18 split southeast to cross the Connecticut River into New Hampshire at Waterford. The highway met the northern end of Route 10 at Littleton and intersected Route 6 in Twin Mountain. Route 18 crossed the White Mountains by way of Crawford Notch, then followed the Saco River to Conway, north of which the highway ran concurrently with Route 16 and Route 28 The highway followed the river into Maine with Route 28 which terminated at the state line, then passed through Bridgton and Naples before reaching its eastern terminus at Route 1 in Portland. Route 18 was superseded by U.S. Route 2, Vermont Route 18, New Hampshire Route 18, and U.S. Route 302. Route 20 Route 20, named the Portland Quebec Highway, began not in Portland but at Route 1 in Brunswick, Maine. The highway headed north to Gardiner, where the highway began to follow the Kennebec River. Route 20 continued through Augusta and Waterville to Skowhegan. The highway joined Route 15 west to Norridgewock, then turned north again to follow the Kennebec River toward Quebec. Route 20 left the river north of Caratunk and reached its northern end at the Canadian border north of Jackman, beyond which the road continued toward Quebec City. Route 20 was replaced by U.S. Route 201. Route 24 Route 24 was originally intended to connect Brunswick and Greenville, Maine, but instead it began in Calais where Route 1 crossed into New Brunswick. The highway headed west along the St. Croix River through Princeton. Route 24 continued north through Topsfield and Danforth to Houlton, where the highway intersected Route 15. The highway continued through the Aroostook County towns of Mars Hill, Presque Isle, and Caribou. Route 24 began paralleling the St. John River at Van Buren. The highway followed the river northwest through Grand Isle to Madawaska, where the highway terminated at its crossing of the river into Edmundston, New Brunswick. Route 24