The Runaway Trailer
A detached trailer chases a family down the road. TSL looks at how it was hitched.
Explore the real law behind this episodeTranscript
TSLDave just wanted to get the kids home before dark.
Tom BriggsA trailer came loose. Nobody could've predicted that. He overreacted, honestly - swerving with kids in the car.
JenNo safety chains. No breakaway brake. The coupler was never even latched. Three things - all required, all missing.
TSLIt didn't come loose. It was never hooked up right. Predictable is exactly what this was.
DaveI have never been chased by a trailer before. No driver. Just the trailer. It was very assertive.
TSLHe's not a stunt driver. He's a dad. And he got them home before dark.
The Runaway Trailer: Hitch Failure and Safety Devices
Dave’s family faces a trailer moving without its tow vehicle. The investigation starts at the coupling and the backup systems meant to limit a separation.
Identify the trailer before applying a rule
49 CFR 393.70 addresses different coupling arrangements, including fifth wheels and full-trailer tow bars. 49 CFR 393.43 addresses breakaway and emergency braking for covered equipment.
The episode groups chains, brakes, and a latched coupler together. Requirements are not identical for every trailer. Identify the configuration and applicable exceptions before deciding that a particular safety device was required.
Preserve the hitch as it was found
The latch, attachment points, breakaway components, maintenance history, and recovery photographs can help distinguish an improperly connected hitch from a broken component. Record who coupled it, who inspected it, and changes made during recovery.
Post-crash position is not necessarily pre-crash condition. Testing should be documented and coordinated so important evidence is not altered without a record.
Evaluate the response in its actual time window
Tom blames Dave’s swerve. A fair reconstruction includes when the trailer became visible, its speed and path, surrounding traffic, and the room available to react. The fictional ending does not establish how a real driver should have responded or predict fault allocation.
Questions this episode raises
- Does every trailer require the same safety chains?
- No. Coupling type, equipment, operation, and applicable rules determine the required devices.
- Does a swerve erase an unsafe hitch’s importance?
- No. The separation and the response both need evaluation in the sequence that caused the collision.
Sources and further reading
- 49 CFR 393.70: Coupling devices
- 49 CFR 393.43: Breakaway and emergency braking
- 49 CFR 392.7: Equipment inspection before driving
Episode explanation by Impact Legal. Updated .