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Overturned Semi-Truck on I-35 Causes Major Delays in San Marcos

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Published on September 24, 2025
Overturned Semi-Truck on I-35 Causes Major Delays in San MarcosSource: Facebook / San Marcos Police Department

Commuters in San Marcos experienced significant disruptions on Wednesday morning when a semi-truck overturned on the northbound Interstate 35 near mile marker 209. The incident, which occurred early in the day, led to the complete closure of all northbound lanes, as reported by CBS Austin. San Marcos police alerted motorists around 6:41 a.m. of the turnover, prompting traffic to be diverted at Exit 208 at the freeway crossing over the Blanco River.

As the efforts to manage traffic pressures mounted, authorities advised drivers to seek alternative routes, suggesting Loop 110 and Post Road. Despite the upheaval, no immediate details about the cause of the accident or potential injuries were released. Motorists, however, were forewarned to anticipate major delays due to the bottleneck effect emanating from the closure.

Relief came later in the morning when the Texas Department of Transportation (TxDOT) declared the reopening of the I-35 northbound lanes post-incident. According to The Austin American-Statesman, the announcement at 11:25 a.m. followed TxDOT's earlier social media post at 7:10 a.m. that confirmed the closure of all northbound I-35 lanes after River Ridge Parkway due to the crash.

This reopening ushered in a return to normalcy for the artery road, which serves as a critical connector across Central Texas, with the lanes becoming fully operational after the morning's logistics and cleanup operations concluded. Traffic began to flow again, easing the congestion that had built up, as the diverted vehicles retreated from the detours earlier suggested by local law enforcement.