Tennessee State Route 155

A sign off Exit 26 offering a choice between SR 155 northbound and SR 155 southbound. Similar signs are common on roads that junction with SR 155.

Briley Parkway consists of the northern loop of SR 155 from I-40 on the west side of Nashville to I-24 southeast of downtown Nashville, which makes up about two thirds of the length of the highway. The entirety of Briley Pkwy. is a controlled access highway, except for the 3.5 miles (5.6 km) segment between I-24 and I-40, including the interchange with US 41/70S (Murfreesboro Pike), which is limited access. Between I-40 near the Nashville International Airport and Ellington Parkway (US 31 E), Briley Pkwy. is four lanes each way. The rest of the Pkwy. is two lanes each way.

Briley Pkwy. begins at a full y interchange with I-40 in west Nashville (although the route continues to the south), and runs north at this point along the northeastern urban boundary of the city of Nashville. The first interchange is with Cockrill Bend Boulevard, which connects to the Riverbend Maximum Security Institution. The parkway then crosses the Cumberland River on the Andrew B. Gibson Bridge, and has an interchange with County Hospital Road near the University School of Nashville. About 1.5 miles (2.4 km) later is an interchange with SR 12 and the parkway curves sharply to the northeast, running mostly east to west beyond this point. The next interchange, about 3 miles (4.8 km) later, is with US 41 Alternate near the neighborhood of Haynes Estates, and about 1 mile (1.6 km) later is an interchange with US 431 (Whites Creek Pike). About 1.5 miles (2.4 km), Briley Pkwy. interchanges with I-24 in a cloverleaf interchange, and about ¹⁄₄ mile (0.40 km) beyond this is an interchange with Brick Church Pike. Beyond this point, Briley Pkwy. continues for another mile, and has a complicated interchange with US 31W/41 and I-65, and U.S. 31E southbound (Ellington Parkway) less than ¹⁄₂ mile (0.80 km) later. At these interchanges, US 31W/41 and I-65 southbound are accessible together from both directions, and I-65 northbound and Ellington Pkwy are accessible together from the westbound lanes. From the eastbound lanes, I-65 northbound and Ellington Pkwy. are accessible independently.

At this point, Briley Pkwy. widens to eight lanes, and begins a brief concurrency with US 31E, which splits off as Gallatin Road at an interchange 0.6 miles (0.97 km) later. The highway then crosses the Cumberland River again, and sharply to the southeast, and has an interchange with McGavock Pike, which is a connector road to the Gaylord Opryland Resort & Convention Center, Music Valley, and the site of the Grand Ole Opry. Entering a short straightaway, Briley Pkwy. runs almost directly north-south at this point, and less than 1.5 miles (2.4 km) later has a trumpet interchange with a connector road to Opry Mills Mall. The next interchange, about ¹⁄₂ mile (0.80 km) later, is an interchange with Two Rivers Parkway. The parkway then shifts slightly to the west, before curving sharply to the east, and then to the west again, in somewhat of a "c-shaped" curve, before reaching an interchange with US 70 (Lebanon Pike) just under 2.5 miles (4.0 km) later. The route shifts slightly again, maintaining its general north-south direction, and reaches the next interchange, which is with Elm Hill Pike slightly over 1 mile (1.6 km) later. The parkway then curves to the southwest, and reaches a cloverstack interchange with Interstate 40 near the Nashville International Airport where the route reduces to two lanes in each direction and the freeway segment ends. Continuing as a limited access highway, Briley Pkwy. has intersections with three major thoroughfares before reaching a trumpet interchange with Airways Boulevard, a connector to the airport. The route continues for another mile, next to an industrial site adjacent to the airport before reaching an interchange with US 41/70S (Murfreesboro Pike). Running northeast–southwest, Briley Pkwy. continues for another 1.5 miles (2.4 km), crossing a railroad, before reaching the interchange with I-24, a partial cloverleaf interchange which also includes access to a restricted connector road to an Averitt Express yard. At this interchange the limited access segment ends, although the Briley Pkwy. designation does not end until an intersection about 0.4 miles (0.64 km) later, where SR 155 becomes Thompson Lane.

The segment of SR 155 designated as White Bridge Road begins at the interchange with I-40 in west Nashville, where the route continues north as controlled-access Briley Parkway. This entire section of SR 155 is a four-lane major arterial thoroughfare with many intersections. Beyond this point, the route immediately has an intersection with US 70, and runs directly north-south before curving to the southeast over 1 mile (1.6 km) later near Nashville State Community College. The route the crosses a railroad and intersects with US 70S (Harding Road). At this intersection, the route becomes two-lane Woodmont Boulevard, and the SR 155 designation ends, although many maps show this segment as being part of SR 155. About ²⁄₃ mile (1.1 km) later the road curves to the southeast, and begins running east-west nearly perfectly straight before reaching an intersection with US 431 (Hillsboro Pike). About 1.5 miles (2.4 km) later, the route widens back to four lanes and has an interchange with US 31 (Franklin Road), where the route becomes Thompson Lane, and SR 155 begins again, this time with a secondary designation. The route then crosses I-65 and intersects with Powell Avenue, which contains signs directing drivers to I-65. Continuing east, SR 155 crosses a railyard and about 1.25 miles (2.01 km) later intersects with US 31A/41A (Nolensville Pike). About 1 mile (1.6 km) later, the route reaches an intersection where Thompson Lane splits off to the north and the route becomes Briley Parkway, and the interchange with I-24 is less than ¹⁄₂ mile (0.80 km) beyond this point.