If you drive SW Military Drive on the South Side, you’ve probably noticed something: it can feel like a “back way” for commercial traffic when the major highways and loops are congested. Military Drive is a key surface corridor that connects with major routes and serves major employment/industrial areas, including the Port San Antonio area where Military Drive is listed among major roadways in the regional center plan.
When heavy trucks and everyday traffic mix on an arterial with frequent driveways, turn lanes, and intersections, the risk of underride accidents goes up—especially at night, in stop-and-go conditions, or when a trailer is turning or crossing traffic.
Quick Answer: What to do after a suspected underride truck accident on SW Military Drive
- Call 911 and get medical help immediately. Underride collisions often cause severe head, neck, and internal injuries—even if symptoms feel “delayed.”
- Preserve evidence early. A trucking company may repair a trailer, swap equipment, or overwrite electronic data quickly. Your case can rise or fall on what is saved in the first days.
- Do not “guess” about fault to an insurer. Texas fault rules can reduce (or eliminate) recovery depending on the percentage of responsibility assigned to you.
- If you can, photograph the trailer and guard area. Underride cases frequently involve questions about visibility, lighting, reflective tape, and whether a rear impact guard performed as intended.
- Act promptly. Texas has strict deadlines for injury and wrongful-death lawsuits (often two years).
What is an underride accident, and why are they so devastating?
An underride crash happens when a passenger vehicle slides under the rear or side of a trailer instead of striking a solid, energy-absorbing surface. The trailer’s underside can intrude into the passenger compartment at windshield level, which is why these wrecks are disproportionately catastrophic.
Federal safety standards exist specifically to reduce deaths and serious injuries in rear-end trailer crashes. The federal rule for rear impact guards states the purpose is to reduce deaths and serious injuries when light vehicles collide with the rear of trailers and semitrailers.
That said, the presence of a guard is not the end of the story. Real-world underride cases turn on details like guard condition, height, alignment, trailer configuration, and whether visibility measures were adequate for the conditions.
Why SW Military Drive can be a “hidden” truck route
I’ll say this carefully: not every commercial vehicle is “avoiding” the loops, and not every truck on Military Drive is doing anything wrong. But in practice, surface corridors like Military Drive can attract commercial traffic for several reasons:
- Congestion or construction on I-35 / Loop 410 / Loop 1604
- Delivery routes to warehouses, industrial yards, and service businesses
- Short hops between highways, frontage roads, and customer locations
- Access to major employment/industrial centers (Military Drive is listed among key roadways in the Port San Antonio area plan)
The important legal point is not “why they were there,” but how the collision happened and what safety steps were taken (or not taken) given the predictable mix of vehicles and frequent turning movements.
How underride crashes commonly happen on Military Drive-type corridors
Underride cases are often not simple “rear-end” claims. These scenarios come up repeatedly:
Trailer turning across or into traffic
A long trailer making a wide right turn or crossing lanes can create a moment where:
- The trailer blocks lanes at an angle,
- The underside is at passenger-car hood height,
- Visibility is reduced (nighttime, rain, glare), and
- The passenger vehicle has limited stopping distance.
Stop-and-go traffic with a poorly visible trailer
Even when a trailer is stopped in a lane, underride risk increases if:
- Lighting/reflectors are inadequate for the conditions,
- The trailer is unmarked or has low conspicuity,
- The rear impact guard is damaged or misaligned.
Roadside access points and driveways
Surface corridors have more driveways and entrances than controlled-access highways. A trailer pulling out or backing can create a low-visibility hazard—especially if the trailer’s reflective markings are dirty, missing, or obscured.
Liability in a Texas underride case: it’s often more than the driver
Underride litigation frequently involves multiple responsible parties and layered insurance.
Potentially responsible parties
- Truck driver (speed, turning method, lane control, lookout, lighting checks)
- Trucking company / motor carrier (training, dispatch pressure, maintenance practices)
- Trailer owner / maintenance provider (guard condition, repairs, inspections)
- Shipper/loader (in some cases, if loading affects trailer ride height, lighting, or safety)
- Other third parties (e.g., a contractor creating an unreasonably dangerous traffic control setup)
Texas fault rules matter (a lot)
Texas uses a proportionate responsibility system. In many cases, a claimant cannot recover if the claimant’s percentage of responsibility is greater than 50%.
That’s why insurance companies often push early narratives like “you were following too closely” or “you should have seen the trailer.” The right response is evidence—measurements, data, and scene documentation—not arguments.
Evidence checklist: what should be preserved immediately?
Underride cases are evidence-heavy. Here’s what typically matters most:
- Photos/video of the trailer rear/side and guard area (including close-ups of damage, height, fasteners, and alignment)
- Conspicuity evidence (reflective tape condition, lighting, mud/road grime, broken lamps)
- Vehicle data (airbag module/EDR in many passenger vehicles; may capture speed/braking)
- Truck electronic data (engine control module, ELD, GPS/telematics, dispatch messages)
- Dashcam/surveillance footage (nearby businesses, traffic cams, home cameras)
- Witness statements (especially neutral witnesses who saw lighting/turning)
- Inspection/maintenance records for the trailer and guard
- Police report + 911 CAD log (timing and first descriptions matter)
A practical tip
If you or a family member can do so safely, photograph the trailer’s DOT numbers, license plate, and any company markings. Identification errors are common in the first 24 hours.
Underride guard rules: what they do—and what they don’t guarantee
Rear guards are regulated at the federal level. The rear impact guard standard explicitly focuses on preventing deaths and serious injuries in rear-end passenger-vehicle impacts.
However, underride cases still happen because:
- The collision is angled or offset (guards perform differently outside straight-on impacts),
- The trailer is turning (side underride risk),
- The guard is damaged, altered, or not properly maintained, or
- Visibility/conspicuity failures prevent a driver from perceiving the trailer in time.
A thorough case evaluation usually includes an engineering review of the trailer/guard geometry and crash dynamics.
Insurance in truck underride cases: why the policy limits may be higher than you think
Commercial motor carriers often have required minimum financial responsibility under federal regulations, depending on the type of operation and cargo.
Separately, there may be additional layers:
- Excess/umbrella policies
- Policies covering the trailer owner (different from the tractor owner)
- Broker/shipper contractual coverage issues
- Your own coverage (PIP/MedPay, UM/UIM, etc.), depending on your policy
This is one reason underride cases should not be evaluated like an ordinary two-car collision.
Table: Common dispute points in SW Military Drive underride claims (and what helps prove them)
| Dispute Point (What insurers argue) | What actually decides it | Evidence that helps |
|---|---|---|
| “You should have seen the trailer.” | Visibility + perception/reaction time under real conditions | Night photos, lighting/reflector condition, witness accounts, video footage |
| “It’s just a rear-end crash, so you’re at fault.” | Trailer position, turning movement, lane blockage, conspicuity, safe driving practices | Scene measurements, skid marks, EDR/telematics, reconstruction |
| “The guard was compliant, so the case is over.” | Compliance is not the same as safe performance in the real collision | Guard inspection, damage analysis, design/height evaluation, maintenance records |
| “The truck driver did everything right.” | Training, route choices, turning technique, fatigue/schedule pressure, maintenance culture | Driver file, dispatch/ELD, prior inspections, company safety policies |
| “Your injuries aren’t from the wreck.” | Biomechanics + prompt medical documentation | EMS records, ER imaging, specialist notes, symptom timeline |
How long do these cases take in Bexar County?
Every case is different, but underride claims typically involve:
- Medical stabilization and documentation (weeks to months)
- Investigation and preservation of truck/trailer evidence (days to weeks—this is time-sensitive)
- Claim presentation and negotiations (often months)
- Litigation if needed (can extend the timeline, especially with multiple defendants and experts)
Also remember the legal deadline: Texas commonly applies a two-year limitations period for personal injury and wrongful death claims, with details that can vary by case.
Attorney Insight: Why underride cases are won or lost early
Underride cases often turn into a battle of physics and documentation. Adjusters and defense teams will scrutinize:
- exact trailer angle,
- lighting conditions,
- whether the trailer was moving/stopped/turning,
- guard geometry and condition,
- and the timeline of what data existed and when it was preserved.
If critical evidence is missing—especially video or electronic data—the case can become an argument contest instead of a proof-based claim. Early, methodical preservation is often the difference between a fair evaluation and a denied/discounted case.
FAQs (short answers)
Can I sue if the truck was turning and my car went under the trailer?
Possibly. Turning underride cases often involve disputed visibility and right-of-way issues. Liability depends on the exact movement, lighting/conspicuity, and whether the trailer created an unreasonable hazard.
What if the insurance company says I’m at fault because it was a “rear-end” crash?
In Texas, fault is apportioned by percentage. If you are found more than 50% responsible, recovery may be barred. That’s why evidence and reconstruction matter in underride cases.
Do trucking companies have to carry higher insurance limits?
Often, commercial carriers are subject to federal minimum financial responsibility requirements depending on operations and cargo. The actual available coverage can be higher due to excess policies and multiple insured entities.
How long do I have to file a lawsuit in Texas?
Many personal injury and wrongful death claims are subject to a two-year limitations period, though exceptions can apply. Do not assume you “have plenty of time” in an evidence-sensitive truck case.
What should I bring to a first consultation?
Bring the crash report number, photos/videos, discharge papers, insurance info, and any correspondence from insurers. If you have it, include the truck/trailer identification information and witness contacts.
Next steps if your crash happened on SW Military Drive (or nearby)
- Get appropriate medical care and follow up with specialists as recommended.
- Write down what you remember (lighting, trailer movement, traffic, weather) while it’s fresh.
- Preserve communications with insurers and avoid recorded statements until you understand the issues.
- Gather the identifiers (DOT numbers, plates, trailer markings) and any video sources nearby.
- Speak with a lawyer who handles serious commercial vehicle injury claims and understands underride-specific evidence.
Ryan Orsatti Law
4634 De Zavala Rd, San Antonio, TX 78249
Phone: 210-525-1200
“This blog is for informational purposes only, not legal advice. Reading it does not create an attorney-client relationship. Past results do not guarantee future results.”