How is fault determined in a multi-vehicle accident?

How the answer differs across 4 jurisdictions

The Short Answer

Fault is determined by assessing each driver’s conduct against the duty of care, apportioning liability based on contribution to the accident under StVG § 17 and BGB § 254 — with courts applying presumptions (e.g., rear-end = following driver at fault) unless rebutted.

50–100%
Liability split range
2 sec rule
Minimum safe following time
100% fault
Rear-end default presumption
No fault
If 'unavoidable event' proven
The Short Answer

Fault in a multi-vehicle collision in Canada is determined by applying the standard of reasonable care expected of drivers, with courts apportioning liability based on each driver’s degree of negligence.

Reasonable care
Legal standard
Apportioned lia
How fault is assigned
Contributory ne
Shared fault concept
1975
Key SCC ruling year
South KoreaFull article
The Short Answer

Fault proportion in traffic accidents in South Korea is determined by evaluating each party’s negligence based on factors like violation of traffic laws, speed, attention, and road conditions — not automatically split 50–50.

Art. 762
Civil Act basis
Art. 3-2
Road Traffic Act
50–100%
Possible fault range
30 days
Claim filing window
The Short Answer

In Japan, fault ratio in accidents is determined by courts based on the degree of negligence or violation of duty by each party, guided by principles in the Civil Code and case law standards — but no fixed statutory formula exists.

Civil Code
Governing law
s. 709
Tort liability
s. 722
Damages reduction
No formula
No statutory ratio method

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Not legal advice. This article is general information based on publicly available sources, written for educational purposes. Laws change and individual situations vary. Consult a licensed attorney in your jurisdiction before acting on anything you read here. Last reviewed: June 2026.