Tanker Curve
Phoenix truck accident lawyer breaks down a tanker rollover: speed, an unbaffled tank, and a prior rollover record. A calculation, not an accident.
Explore the real law behind this episodeTranscript
TSLHector worked the same twelve acres his father did. Forty years of the same mountain road.
Tom BriggsHe rolled his own truck. How is that our client's concern?
JenHe took a posted thirty-mile curve at fifty, with a tank that wasn't baffled. The liquid surged, the truck went over. The math was always going to do that.
TSLA loaded tanker on a curve isn't a surprise. It's a calculation. He just didn't do it.
HectorForty years that curve never moved. He's the first one to lose an argument with it.
TSLHe knew that road like his own hands. He slowed for the curve. The other fella thought the rules bent for him.
Tanker Curve: Liquid Surge, Speed, and Rollover
Hector knows the mountain road. A tanker enters a curve too quickly in the story. Load, tank design, and maneuver all belong in the explanation.
A posted speed does not settle safe handling
A.R.S. 28-701 requires reasonable and prudent speed for conditions. A tanker’s safe approach can depend on the curve, load, surface, and vehicle, not just the sign.
The ADOT CDL manual’s tank-vehicle section explains liquid movement. An unbaffled tank is not automatically unlawful; some cargo operations use designs without baffles. The vehicle must be operated with its particular handling characteristics in mind.
Identify the load and the movement
Loading tickets, quantities, weights, tank design, speed, braking, and steering evidence can help an expert evaluate the rollover. A partially filled tank may behave differently from a full one.
The animation compresses the physics. Actual causation requires examining center of gravity, geometry, tire marks, and sequence rather than treating a single characteristic as sufficient. Preserve the configuration and load records before unloading changes the picture.
Trace the consequences beyond the truck
A rollover can affect others even if the tanker initially loses control alone. Preserve the path of the tanker and spilled cargo, surrounding vehicle positions, and witnesses to evasive movements. Injuries and losses must be linked to that sequence.
Questions this episode raises
- Is an unbaffled tanker automatically illegal?
- No. Tank design and cargo requirements vary; operation must suit the actual vehicle and load.
- Can a driver be too fast below the posted limit?
- Yes. Safe speed depends on conditions and the vehicle, not solely the posted maximum.
Sources and further reading
- A.R.S. 28-701: Reasonable and prudent speed
- ADOT Commercial Driver License Manual
- 49 CFR 393.100: Cargo securement
Episode explanation by Impact Legal. Updated .