Автодорога Loop 1604: Окружная трасса Сан-Антонио, Техас.

Loop highway around San Antonio, Texas

Loop 1604 is the outer highway loop encircling San Antonio, Texas, spanning approximately 95.6 mile (154 km). Originally constructed as a two lane highway, the northern segment of the route, from US 90 in western San Antonio to Kitty Hawk Road in northeastern Bexar County, has been upgraded to a four lane freeway. Loop 1604 is designated the Charles W. Anderson Loop in honor of former Bexar County Judge Charles W. Anderson, who died from cancer in 1964 after serving for 25 years.

Loop 1604 forms a complete loop around the city of San Antonio and is the outer of two loops around the city with I 410 being the inner loop. The route has portions that are built to freeway standards, portions built as a divided highway, and portions that are just a two lane rural road. As with I 410, the city's inner loop, the northern half is more urbanized and the southern half, for the most part, remains rural. The loop officially begins and ends at I 10 east of San Antonio. and Google Earth satellite imagery showed this freeway under construction in 2017 2018. The freeway portion starts as the loop curves towards the northeast at the junction with SH 151. Loop 1604 has diamond interchanges at FM 471 (Culebra Road), Shaenfield Road, New Guilbeau Road, Braun Road, and SH 16 (Bandera Road). Continuing east from the US 281 interchange, the freeway has interchanges with several local roads to include Gold Canyon Drive, Redland Road, Bulverde Road, and O'Connor Road. The freeway continues east to interchanges with Judson Road and Green Mountain Road before it curves to head to the southeast. Now heading southeast, the freeway has an interchange at FM 2252 near Rolling Oaks Mall and an interchange at Lookout Road before it leaves the San Antonio city limits. Upon leaving San Antonio, the freeway enters the Live Oak city limits before a cloverleaf interchange at I 35. Southeast of I 35, Loop 1604 enters the Universal City city limits before reaching an interchange with SH 218, which provides access to Randolph Air Force Base. TxDOT has upgraded two intersections between the interchange at SH 218 and Kitty Hawk Road, where Loop 1604 used to have two at grade turn offs, one at Palisades Drive and one at Granada Drive. These intersections are now separated from the main lanes and are relegated to the service road at these locations. The same applies to two former at grade turn offs southeast of the Kitty Hawk Road interchange at Meadowland Drive and Byrd Boulevard. Meadowland and Byrd now do not intersect the main lanes of Loop 1604 The last two interchanges of the freeway are located at FM 1976 and FM 78. Once in the Converse city limits, Loop 1604 remains a 4 lane divided highway, but has at grade intersections. The highway passes by the western boundary of Randolph Air Force Base before curving to the south. The highway re enters San Antonio city limits prior to its interchange at I 10 at its official beginning and end. New overpasses were built at Shaenfield Road, New Guilbeau Road, and Braun Road. TxDOT has expanded the project further south to SH 151 and US 90, creating a direct flyover overpass from southbound Loop 1604 to eastbound US 90. The expansion was deemed necessary due to the growth of San Antonio's far west side.

TxDOT plans to widen Loop 1604 from four lanes to ten between SH 16 (Bandera Road) near Helotes and I 35 in Universal City. The expansion will add two travel lanes and one HOV lane in each direction. Additionally, the project will replace the cloverleaf interchange at I 10 with a five level stack interchange, reconfigure the layout of exit and entrance ramps, along with other improvements. Segment 1 (SH 16 to I 10) officially broke ground on July 26, 2021 and is expected to be completed by mid 2024;

Clockwise reads down and counterclockwise reads up.