U.S. Route 66 | U.S. Route 1 | Messerschmitt Bf 109 | U.S. Route 6 | U.S. Route 101 | Route 66 | U.S. Route 30 | New Jersey Route 4 | European route E65 | U.S. Route 40 | California State Route 1 | U.S. Route 1 in Maine | Pennsylvania Route 309 | European route E18 | U.S. Route 23 | European route E4 | U.S. Route 9 in New York | U.S. Route 11 | Pennsylvania Route 82 | European route E70 | U.S. Route 90 | U.S. Route 75 | U.S. Route 61 | U.S. Route 60 | Pennsylvania Route 73 | New York State Route 32 | European route E55 | U.S. Route 80 | U.S. Route 71 | U.S. Route 51 |
The road that continues after the interchange (West St./Common St.) passes Northeastern University's Dedham campus and meets Route 109 approximately a half mile to the southeast, near Dedham Center.
Bus Éireann route 109 provides two journeys a day in the morning to Kells via Dunshaughlin and Navan and two return journeys in the evening.
Route 109 runs between the Meadowvale Town Centre terminal in northwest Mississauga, the Erin Mills Town Centre Bus Terminal in western Mississauga serving the growing Erin Mills community, the City Centre Transit Terminal, the Airport Corporate Centre, and the Islington Subway Station, a major terminal in Toronto.
Present-day Route 109 was designated as a part of pre-1927 Route 14 in 1917 before becoming the southernmost portion of Route 4 in 1927.