Texas US 90 begins at an
intersection with
BL I-10 and
SH 54 in downtown
Van Horn. It then heads south-southeast towards
Marfa, where the route begins to head generally east. The route mostly consists of two lanes west of
Uvalde. At this point, it becomes a four-lane surface road until it reaches western
Bexar County where it becomes a
freeway, joining
I-10 in
Downtown San Antonio. This
concurrency with I-10 continues intermittently into western
Houston, where US 90 follows the Katy Freeway. The section of US 90 that is multiplexed with I-10 through Houston is the only section of the route that is unsigned. In eastern Houston, US 90 splits from I-10 and heads northeast towards
Liberty, eventually traveling through
downtown Beaumont where it rejoins I-10 for the rest of its routing through Texas. The speed limit on US 90 between Van Horn and
Del Rio is mainly . Beginning at
Seguin,
US 90 Alternate splits from US 90 and travels parallel to the south, rejoining the main route in northeast Houston. In 1991, the construction on a four- to six-lane freeway northeast of Houston in
Harris County was completed along a new routing for US 90; that portion was designated the Crosby Freeway. This segment traveled from just inside
Beltway 8 to east of the town of
Crosby. Construction began in 2006 to extend the freeway westward to the intersection of I-10 (East Freeway) and the
I-610 (East Loop). On January 24, 2011, the new extension officially opened. Due to lack of funds, overpasses were not built over
Greens Bayou and over future Purple Sage Road, leaving traffic to briefly exit to the frontage roads before rejoining the freeway.
Louisiana Entering Louisiana from the west, US 90 and
I-10 travel side by side through
Lake Charles to
Lafayette. In Lafayette, US 90 and I-10 part ways: I-10 proceeds east to
Baton Rouge, while US 90 takes a southern turn and passes through
New Iberia,
Franklin,
Morgan City, and the
Houma – Bayou Cane – Thibodaux metropolitan area before reaching
New Orleans. The four-laning of US 90 was pushed in the 1990s by former
State Senator Carl W. Bauer through his role as the chairman of the Governor's
Interstate 49 Task Force while also a member of the Greater Lafayette
Chamber of Commerce. The portion of US 90 from Lafayette to New Orleans is designated to become the corridor for
I-49. In New Orleans, US 90 again meets up with I-10, and the two highways follow a similar path into Mississippi.
Mississippi The description of US 90's route in Mississippi is explained in State Code § 65-3-3. Prior to Hurricane Katrina, Mississippi's portion of US 90 was entirely four-lanes except for a very short segment at the state's west end leading to the old Pearl River Bridge into Louisiana. That segment of old highway is obviated for most purposes by an extension of the four-lane roadway from its split with US 90 to I-10 just east of the much newer Pearl Bridge. Before
Hurricane Camille in 1969, the stretch of US 90 from the Bay St. Louis Bridge at the west end to the Biloxi Bay Bridge at the east was one of the most scenic roadways in the south, offering beautiful views of the
Gulf of Mexico on its south side and lovely mansions — some
antebellum — on its north. The median featured many old, stately oak trees, a good number of which survived the storm. Many segments and important bridges were heavily damaged or destroyed by Hurricane Katrina in 2005. With the opening of two lanes of the Biloxi Bay Bridge on November 1, 2007, the entire route is now restored. Reconstruction projects continue on much of the highway and lane closures are common. Substantial completion of all US 90 Katrina-related road work in this state was scheduled to have been completed by now. 'US Highway 90 Project History' recounts in some detail this roadway's colorful past in Mississippi, dating back to the early 20th century when it was part of the
Old Spanish Trail. The pdf document is available at the 'Project Updates' page of the
Mississippi Department of Transportation's website (www.gomdot.com).
Alabama concurrency ends in
Grand Bay. US 90, internally designated by the
Alabama Department of Transportation as
State Route 16 (
SR 16), is a major east–west
state highway across the southern part of the
U.S. state of
Alabama. US 90/SR 16 crosses the extreme southern part of the state, covering approximately . The routes pass through Baldwin County before entering the city of
Mobile where it gains a
wrong way concurrency with US 98. and later joins US Truck Route 98, briefly also overlapping
Interstate 165. The portion of US 90 that crosses Mobile Bay is locally referred to as the "
Causeway". With the completion of
I-10, US 90/SR 16 serves primarily as a local route connecting the towns along its path.
Florida , looking east As it enters the Sunshine State, US 90 shifts south towards
Pensacola while
US 90 Alternate stays to the north of the city. This stretch of highway is also known as Nine Mile Road. After
Hurricane Ivan destroyed the
I-10 Bridge in Northwest Florida, motorists waited as long as two hours to cross the
Escambia bridge between
Santa Rosa and
Escambia counties. The highway's route continues to the north of I-10 as a two-lane highway through most of the sparsely populated inland areas of the
panhandle, becoming four lanes through and near several towns. In
Gadsden County, US 90 cuts to the southeast toward downtown
Tallahassee, where it passes the north entrance of
Florida State University and expands to six lanes until its intersection with
US 27. In 2026, a portion of the highway, between Lancelot Road and Oakridge Way, was named “Deputy William May Memorial Highway”, in honor of fallen police officer William May. The portion of the highway that extends through
Midway has been designated as the
Alfred Lawson, Jr. Highway. Continuing east, the highway is a two-lane road north of I-10 along the rest of its route, except as it turns to the south to pass through
Lake City at
I-75. After going through the
Osceola National Forest, it passes
I-295 heading into
Jacksonville, becoming four lanes through the industrialized west side as Beaver Street, and through downtown as Union Street. It crosses the
St. Johns River on the
Main Street Bridge and continues east as
Beach Boulevard to its terminus at
Florida State Road A1A in
Jacksonville Beach. US 90 passes through the
county seats of 15 counties on its course in Florida, and is never more than from I-10 throughout the state. The highway's hidden
state road designation is primarily
Florida State Road 10 (
Florida State Road 10A in Pensacola), but along Beach Boulevard in Jacksonville it becomes
Florida State Road 212. The speed limit is for all rural points west of
Monticello, Florida, and it is on all rural points beginning in Madison County to
Glen St. Mary. ==History==