State Route 109 Widening
Sumner and Wilson CountiesTimeline
Transportation projects are developed in four phases: Planning and Environmental, Design, Right-of-Way (ROW), and Construction. The following is a reflection of various aspects of the project phases as they have occurred or will occur for the SR 109 proposed improvements.
| Location | Current Status | Forecasted Status* |
| Gallatin Bypass north of Gallatin to SR 52 in Portland (11.5 miles) | Completed | n/a |
| Gallatin Bypass (new alignment) west of Gallatin (6.0 miles) | Completed | n/a |
| north of Cumberland River Bridge to Gallatin Bypass south of Gallatin (1.3 miles) | Completed | n/a |
| Cumberland River Bridge | Completed | n/a |
| north of SR 24 (US 70) to south of Cumberland River Bridge (7 miles) | Under Construction |
Estimated completion November 2020 |
| north of I-40 to south of SR 24 (US 70) | Completed | n/a |
In addition to the completed and proposed widening projects, a new interchange is currently under construction in Sumner and Robertson Counties, which will connect I-65 with a new alignment of SR 109, and a new bypass is under development, which will be constructed to the west of the city of Portland.