Intersection of Aquarena Springs Drive and Post Road in San Marcos — live webcam traffic

The intersection of Aquarena Springs Drive and Post Road is one of the most unusual traffic junctions in San Marcos, Texas. The live webcam shows a multi-lane intersection where vehicle traffic, railway tracks, and an innovative traffic control scheme all converge. This section of the road network connects the city's key arteries and provides access to Interstate I-35.

Intersection of Aquarena Springs Drive and Post Road — San Marcos traffic hub

San Marcos is located about 50 kilometers south of Austin and 80 kilometers north of San Antonio, along the I-35 corridor — one of Texas's main transportation arteries. The intersection of Aquarena Springs Drive (Loop 82) and Post Road is situated in the eastern part of the city and serves as a vital link between the Texas State University campus, residential neighborhoods, and the federal highway. The road camera online allows you to assess the current congestion at this strategic junction.

Aquarena Springs Drive is Loop 82, a loop road that skirts the eastern part of San Marcos. It begins at I-35 at Exit 207 and passes the university campus, stadium, and nature center. Post Road crosses Loop 82 at a right angle, creating a busy intersection with heavy traffic during peak hours.

Continuous Flow Intersection — innovative traffic scheme

The main feature of this intersection is the use of the Continuous Flow Intersection (CFI) scheme, also known as Displaced Left-Turn. This is an engineering solution where vehicles intending to turn left cross the opposing lanes in advance — before the main intersection. Left-turning flows are diverted to a separate traffic signal located 50–100 meters before the central part of the junction.

This configuration eliminates the need for separate left-turn signals at the main intersection. As a result, capacity increases by 20–50% compared to a traditional scheme, and the number of conflict points is reduced. Eastbound left turns on Aquarena Springs Drive cross the opposing flow before intersecting with the southbound frontage road of I-35, after which they share lanes with southbound U-turn traffic to turn onto the northbound frontage road. The project was implemented by TxDOT (Texas Department of Transportation) as part of a program to reduce congestion on the I-35 corridor.

Railroad crossing and overpass construction plans

At the intersection of Aquarena Springs Drive and Post Road, there is a railroad crossing (grade crossing), through which the tracks of the I&GN (International–Great Northern Railroad) and H&TC (Houston and Texas Central Railway) pass. The crossing is equipped with warning devices — flashing red lights and automatic gates — as well as traditional crossbuck signs.

The presence of a railroad crossing at such a busy intersection creates problems: when a train passes, traffic is completely blocked, causing backups on the approaches to I-35. City authorities have developed a plan to build a $39 million overpass over the railroad tracks on Aquarena Springs Drive. The project involves the complete elimination of the grade crossing and the separation of traffic levels, which should radically improve the transportation situation in eastern San Marcos.

Connection to Interstate I-35

Aquarena Springs Drive connects directly to Interstate I-35 at Exit 207. I-35 is one of the key highways in the USA, connecting Dallas in the north with Laredo in the south and passing through the largest cities in Texas: Austin, San Antonio, Waco, and Fort Worth. In the San Marcos area, the highway handles tens of thousands of vehicles daily, including heavy trucks.

The frontage road (parallel road) of I-35 runs directly adjacent to the intersection, creating additional traffic conflict points. The southbound and northbound frontage roads connect to Aquarena Springs Drive via a system of ramps, and it is here that the CFI scheme demonstrates its advantages — effectively distributing flows between the main highway and city streets. The traffic camera online at this intersection is especially useful for drivers planning a route between I-35 and eastern San Marcos.

Surroundings of the intersection: university and stadium

The intersection of Aquarena Springs Drive / Post Road is located in close proximity to several major facilities. At 1100 Aquarena Springs Drive is Bobcat Stadium (also known as Jim Wacker Field at Bobcat Stadium or UFCU Stadium) — the home arena of the Texas State University football team. The stadium seats over 30,000 spectators, and on game days, traffic at the intersection increases manifold.

Across from the stadium, across San Marcos Springs Drive, is the Meadows Center for Water and the Environment — an educational and research center located on the site of the former Aquarena Springs theme park. In 1994, Southwest Texas State University acquired the park territory and transformed it into a 90-acre nature center. The glass-bottom boats that carry tourists along the crystal-clear waters of San Marcos Springs remain one of the area's main attractions.

Texas State University is the largest employer and traffic generator in San Marcos. Tens of thousands of students, faculty, and staff use Aquarena Springs Drive daily to access the campus, making the intersection with Post Road a critical element of the city's transportation infrastructure.

Road infrastructure and markings

The intersection is a multi-lane junction with developed infrastructure. Road markings with arrows indicating turn directions — straight, left, and right — are applied to the asphalt. Thanks to the CFI scheme, left-turn lanes are shifted to the west side of Aquarena Springs, and drivers follow separate sections of markings, crossing opposing traffic under the control of additional traffic signals.

On the median and along the road, there are green plantings, gravel fill, and chain-link fences. The intersection reconstruction project included the installation of 8-foot sidewalks for pedestrians and cyclists, increasing the safety of non-motorized road users. In the background, an overpass is visible — a bridge that is part of the I-35 exit infrastructure.

The online video surveillance system allows real-time assessment of road surface conditions, the presence or absence of precipitation, and traffic density by direction. This is especially valuable for drivers heading to a Bobcat Stadium game or the university campus — knowing the current situation, you can choose an alternative route via I-35 or Posey Road.

What the camera shows

The webcam broadcasts a view of the multi-lane road intersection with railway tracks. In the frame is a railroad crossing with warning devices: flashing lights and crossbuck signs. Road markings with arrows indicating the direction of turns are applied to the asphalt. On the right side of the road, a flow of traffic is moving; in the upper left, lanes for left-turn maneuvers according to the CFI scheme are visible. On the median and along the road, there are green plantings, gravel fill, and a chain-link fence. In the background, an overpass — a bridge over the tracks — is visible. A typical suburban intersection with infrastructure for road and rail transport in San Marcos, Texas.