- Southern Terminus:
- Barnum Avenue (US 1) in Stratford
- Northern Terminus:
- Howe Avenue (CT 110) in Shelton
- 11.05 miles
CT 108 is a north/south route extending from Stratford to Shelton. It begins at Barnum Avenue (US 1) and runs north. The first section is called Nichols Avenue. After a couple of miles, it crosses the CT 8 expressway and the Merritt Parkway (CT 15), having interchanges with both. North of the parkway, it changes names to become Huntington Turnpike and runs north to Huntington. Huntington Turnpike ends at the Huntington Green. On the other side of the green, CT 108 continues as Shelton Avenue, which runs northeast to Shelton, where it changes names to become Wooster Street. At the northern terminus, CT 108 turns south onto Coram Avenue for a few blocks and then east onto Center Street for one block to end at Howe Avenue (CT 110). The entire length of CT 108 is a two-lane undivided road.