DOT Accident Investigation & Reporting 3

Question 1

When interviewing witnesses at an accident scene, which interviewing technique is most appropriate for a DOT investigator?

Accepted Answer

Separate witnesses and conduct individual interviews to avoid influence

Answer

Witnesses must be interviewed separately to prevent their accounts from being influenced by other witnesses' statements.

Question 2

A driver involved in a fatal accident refuses a post-accident drug and alcohol test. Under FMCSA regulations, what is the consequence?

Accepted Answer

The carrier must remove the driver from safety-sensitive functions

Answer

Under 49 CFR Part 382, a driver who refuses post-accident testing must be immediately removed from safety-sensitive functions.

Question 3

What is the maximum time window after a fatal accident within which a driver must complete a post-accident alcohol test under 49 CFR 382.303?

Accepted Answer

8 hours

Answer

Post-accident alcohol testing must be completed within 8 hours of the accident; otherwise, the attempt must be ceased and documented.

Question 4

When documenting skid marks at an accident scene, which measurement approach provides the most forensically useful data?

Accepted Answer

Measure each mark individually from start to end and record GPS coordinates

Answer

Each skid mark must be measured individually with precise start/end points and geolocated to support speed and braking analysis.

Question 5

Under the Motor Carrier Safety Improvement Act, an 'unsatisfactory' safety rating following a pattern of accidents can result in which action?

Accepted Answer

Prohibition from operating in interstate commerce

Answer

Carriers rated 'Unsatisfactory' by FMCSA are prohibited from operating in interstate commerce until corrective action is verified.

DOT Inspector Certification Practice Test