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I-35 vs. I-37: Which Highway Sees More Bexar County Wrecks?
Two of the most heavily traveled interstate highways in San Antonio cut through Bexar County carrying hundreds of thousands of vehicles every day, and both have earned reputations as dangerous corridors where car accident lawyers handle a relentless volume of injury claims. Interstate 35 runs north-south through the heart of the city, connecting San Antonio to Austin, Dallas, and beyond, while Interstate 37 stretches southeast from downtown toward Corpus Christi and the Texas coast. San Antonio car accident attorneys who represent wreck victims from both highways see devastating injuries caused by speed, congestion, distracted driving, and commercial truck traffic. Understanding which highway sees more crashes in Bexar County — and why — matters for every driver who navigates these routes. If you have been hurt in a collision on either I-35 or I-37, experienced lawyers can help you understand your rights and pursue the full compensation your injuries demand.
The raw numbers from the Texas Department of Transportation make one thing clear: Interstate 35 generates significantly more crashes in Bexar County than Interstate 37 on an annual basis. TxDOT data consistently shows that the I-35 corridor through San Antonio ranks among the most dangerous stretches of highway in the entire state of Texas, with thousands of reported collisions each year. Car accident lawyers in San Antonio who pull crash reports from the I-35 corridor see everything from minor fender benders to catastrophic multi-vehicle pileups involving 18-wheelers. The sheer volume of traffic on I-35 — which carries well over 150,000 vehicles per day through central San Antonio — creates a constant state of congestion that breeds rear-end collisions, sideswipe accidents, and dangerous lane-change crashes. Attorneys representing victims from I-35 wrecks know that high traffic density alone does not excuse negligent driving behavior.
Interstate 37, while carrying substantially less traffic than I-35, presents its own distinct set of dangers that keep car accident attorneys in San Antonio busy with serious injury cases. The I-37 corridor handles roughly 80,000 to 100,000 vehicles per day near downtown San Antonio, with volumes tapering off significantly south of Loop 410. However, the crash severity rate on I-37 tells a sobering story. Because I-37 features longer open stretches with higher average speeds, the collisions that do occur tend to involve greater force and produce more serious injuries. San Antonio car accident lawyers who compare case files from both highways note that I-37 wrecks more frequently involve fatalities, rollovers, and high-speed commercial truck accidents that leave victims with life-altering disabilities.
Breaking Down the Crash Data on San Antonio’s Two Major Interstates
When comparing I-35 and I-37, total crash volume favors I-35 as the more dangerous highway by a wide margin. TxDOT’s Crash Records Information System reveals that the I-35 corridor through Bexar County typically sees three to four times as many reported collisions as I-37 in any given year. The most dangerous segments of I-35 in San Antonio include the stretch between Loop 410 and Loop 1604 on the northeast side, the downtown corridor where I-35 and I-10 overlap, and the area near Walzem Road and Rittiman Road where merging traffic from multiple interchanges creates constant turbulence. Car accident lawyers who handle cases from these specific zones understand that the complex interchange designs contribute directly to the high crash rates.
Why I-35 Produces More Crashes in Bexar County
Several factors explain why Interstate 35 dominates the crash statistics in Bexar County compared to Interstate 37. First, I-35 serves as a primary corridor for commercial freight traffic moving between Mexico, San Antonio, Austin, Dallas, and points north, meaning the percentage of large trucks in the traffic mix is exceptionally high. The Federal Motor Carrier Safety Administration reports that Texas leads the nation in fatal crashes involving large trucks, and the I-35 corridor through San Antonio is one of the primary contributors to that statistic. Second, I-35 passes through more densely developed areas with closely spaced interchanges, which create frequent merging and weaving movements that increase collision risk. Third, the ongoing expansion and construction projects on I-35 through San Antonio have created years of lane shifts, temporary barriers, and work zones that confuse drivers and reduce available road space.
The Hidden Dangers of Interstate 37
Although I-37 sees fewer total crashes, the highway carries risks that San Antonio drivers should not underestimate. The southeast corridor of I-37 beyond Loop 410 transitions from urban highway to a more rural character, and drivers often increase their speed dramatically once they clear the city congestion. This speed differential creates dangerous situations when faster-moving vehicles encounter slower traffic, agricultural equipment, or vehicles entering from rural access points. Additionally, I-37 serves as the primary evacuation route from the Texas coast during hurricane season, and the periodic surge of evacuation traffic has historically caused major multi-vehicle accidents. Lawyers who handle I-37 crash cases also point to impaired driving as a significant factor, particularly on weekend nights when drivers returning from the coast or from entertainment venues in the Southtown area misjudge their ability to drive safely.
Truck Accidents: A Common Thread on Both Highways
Large commercial trucks are involved in a significant percentage of the most serious crashes on both I-35 and I-37. San Antonio sits at the crossroads of major freight routes, and both highways carry enormous volumes of 18-wheelers, tanker trucks, and other commercial vehicles daily. When a fully loaded commercial truck weighing 80,000 pounds collides with a passenger vehicle, the results are almost always catastrophic for the occupants of the smaller vehicle. Car accident attorneys who specialize in truck wreck cases on these San Antonio highways investigate whether the trucking company followed federal hours-of-service regulations, whether the truck was properly maintained, and whether the driver was impaired, distracted, or inadequately trained. These cases often involve significantly higher damages than standard passenger vehicle accidents due to the severity of the injuries involved.
Weather and Road Conditions Affect Both Corridors
San Antonio’s weather plays a role in crash patterns on both I-35 and I-37. Sudden thunderstorms can create flash flooding conditions that are especially dangerous on the lower-lying sections of both highways. The I-35 corridor near downtown San Antonio has experienced flooding events that trapped motorists and caused chain-reaction crashes. On I-37, the flat terrain south of the city combined with poor drainage in certain sections creates hydroplaning risks during heavy rain. Winter weather events, though less frequent in South Texas, catch drivers off guard with icy bridge decks and overpasses on both interstates. Lawyers representing crash victims injured during adverse weather conditions work to establish that the at-fault driver failed to exercise the level of caution that conditions demanded.
What Crash Victims on Either Highway Should Know
Whether your accident occurred on I-35 or I-37, the steps you take after the crash are crucial to protecting your legal rights. Document the scene thoroughly with photographs, obtain the police report number, and seek immediate medical evaluation even if you feel fine at the scene. Many serious injuries, including traumatic brain injuries and internal bleeding, may not present obvious symptoms immediately. Report the accident to your own insurance company, but do not provide recorded statements to the other driver’s insurer without consulting an attorney first. Insurance companies handling claims from high-volume crash corridors like I-35 and I-37 often attempt to settle quickly and cheaply before victims understand the full extent of their injuries.
Experienced Lawyers Know These San Antonio Highways
San Antonio car accident lawyers who regularly handle cases from both I-35 and I-37 bring invaluable local knowledge to their clients’ claims. They understand the specific interchange designs, traffic patterns, construction zone configurations, and common crash causes on each highway. This expertise allows them to identify negligent parties quickly, preserve critical evidence before it disappears, and build compelling cases for maximum compensation. Whether you were rear-ended in stop-and-go traffic on I-35 or sideswiped by a speeding truck on I-37, the right legal team can help you recover damages for medical expenses, lost wages, pain and suffering, and future care needs. Contact experienced San Antonio car accident attorneys today for a free consultation and put their highway-specific knowledge to work for your case.