Blind Spot Truck Accidents: Who Is at Fault?

Every commercial truck on Illinois roads travels with wide zones where the driver simply cannot see you. When a crash happens in one of these areas, insurers and defense lawyers have a favorite move: blame the person who couldn’t be seen. The Federal Motor Carrier Safety Administration calls these areas “No-Zones.” What they are, and what duty they create, is exactly what decides fault in a semi truck blind spot accident once fault is disputed.

This article is general legal information. For advice about your specific situation, talk to a licensed Illinois attorney.

What Are the FMCSA No-Zones?

The FMCSA runs a driver-training and safety-awareness campaign called No-Zone. It maps four blind-spot areas around a commercial truck where crashes cluster, and the map isn’t guesswork. It comes straight from the geometry of the vehicle: how high the cab sits, how long the trailer runs, where a mirror simply can’t reach:

• Front No-Zone: About 20 feet directly ahead of the cab. Truck cabs sit high off the ground, so a car that cuts back in too close after passing can vanish from the driver’s line of sight completely.
• Rear No-Zone: About 30 feet behind the trailer. A passenger car has a rear-view mirror. A truck doesn’t. Follow too closely and you’re simply not there, as far as that driver can tell.
• Left (driver’s side) No-Zone: One lane wide, running from the cab back to roughly the midpoint of the trailer. Smaller than the right side, but the gap is still real.
• Right (passenger’s side) No-Zone: Two lanes wide, running the full length of the truck. This is the biggest blind area on the vehicle, and in our experience, it’s where we see the most serious blind-spot crashes.

That diagram, published on fmcsa.dot.gov, gets used constantly in truck litigation. Safety trainers rely on it. Expert witnesses rely on it. So do we, when we’re reconstructing where each vehicle actually sat in the seconds before impact.

The “You Were in My Blind Spot” Defense, and Why It Fails

We see this argument in nearly every blind-spot case. The truck driver’s insurer says you were in a No-Zone, so you took the risk of not being seen. That’s the pitch. It’s also wrong, in two specific ways.

First: a driver’s blind spot doesn’t shrink the driver’s duty. Federal rule 49 CFR Part 392.2 requires every commercial driver to follow the traffic laws of the state they’re driving in, blind spot or not. Illinois law, at 625 ILCS 5/11-703, requires a driver overtaking another vehicle to make sure the lane is actually clear before finishing the move. Neither rule comes with a waiver for wide trailers or tall cabs.

Second: professional drivers are held to a professional standard. The FMCSA’s Large Truck Crash Causation Study points to driver recognition failures as a leading factor in commercial vehicle crashes, exactly the kind of failure that missing a vehicle in a blind spot represents. A CDL holder is trained to check mirrors on a rhythm, signal early, and confirm the lane is clear before moving into it. Here’s where it gets uncomfortable for the defense: “I didn’t see you” isn’t an excuse when seeing you was the job.

Who Can Be Held Liable After a Blind Spot Crash?

Fault in a commercial truck crash is rarely just one driver’s problem. Determining truck accident liability in Illinois often means working through several layers of the trucking business:

• The truck driver can be liable for a missed mirror check, a skipped signal, or a lane change made without confirming the lane was clear.
• The trucking company can be liable under respondeat superior, a legal doctrine that holds an employer responsible for what an employee does on the job, or directly, for hiring poorly, training thinly, or ignoring its own safety rules.
• A third-party contractor can share liability if the driver was an independent owner-operator working under another motor carrier’s operating authority.
• A vehicle maintenance company can bear responsibility if a broken or badly adjusted mirror went unnoticed before the truck went back on the road.

Illinois uses a modified comparative fault system. Translation: even if an investigation puts some of the blame on you for being in a No-Zone, you can still recover damages, as long as your share of fault stays at 50 percent or below. That’s exactly why we push back on an insurer’s first-draft version of events instead of accepting it.

Evidence That Matters in Blind Spot Accident Claims

A strong claim depends on evidence that has a shelf life. Trucks today are rolling data centers, and what’s stored on and around them can decide the case, if someone gets to it before it’s gone:

• Electronic logging device (ELD) and ECM data: the truck’s speed, braking, and turn signal activity in the seconds before impact, all logged automatically.
• Dashcam and external camera footage: a lot of trucks on the road now carry forward and side cameras, and they may have caught the whole thing.
• Driver qualification file: training records, past violations, and hours-of-service logs. Patterns show up here that a single crash report never will.
• Truck maintenance records: mirror adjustment logs and inspection reports that show whether the safety equipment was actually working.
• Eyewitness accounts and police reports: independent accounts of where each vehicle was and how the lane change unfolded. These can confirm the blind spot defense, or take it apart.

Trucking companies move fast after a crash. Their legal teams are often on scene within hours. One of the first things we do is send a legal hold letter, a formal demand that all electronic data, logs, and footage be preserved, because a lot of this evidence gets overwritten or discarded on a routine schedule if nobody stops it.

Illinois Law and Your Right to Recover

Under 625 ILCS 5/11-703, Illinois drivers have to confirm a lane change can be made safely before making it. When a truck driver merges into or across a lane where another vehicle already is, failing to check first is strong evidence of fault under that statute. Add federal rule 49 CFR Part 392.2 on top of that, and a crash victim usually has more than one legal standard working in their favor.

Illinois does not cap compensatory damages in most personal injury cases. That means victims of a blind spot truck accident can pursue economic damages (medical bills, lost wages, future care costs) and non-economic damages (pain and suffering, loss of normal life) both. Sit with what these crashes actually do to a body: full-body side impacts, underride situations where a car goes under the trailer. The medical bills and the recovery time tend to reflect that.

Talk to a Chicago Attorney for a Free Consultation

If a blind spot truck crash has touched your family, in Chicago or anywhere else in Illinois, our team at Phillips Law Offices wants to hear from you. Call (312) 346-4262 or contact us online for a free, no-obligation consultation. We dig into these cases hard. We move on the trucking data before it disappears. And when the other side says “I didn’t see you,” we’re ready with the evidence that answers it.