Where to Start Reading
Four common situations and the route through these notes that suits each, plus the three to read if you only have time for three.
Reference · Reference
Fifty notes is more than anyone needs at once. These are the paths that fit the common situations.
A system is being proposed
The question to ask first.
What actually predicts a collision, which usually reframes the business case.
Choosing a system, for the questions that separate products.
Reading a vendor claim.
Where to start, for the quarter that precedes any purchase.
The system is live and nobody trusts the numbers
Thresholds and what they decide.
Whether the data is any good, for the four checks.
The statistics that mislead.
How a score is built.
Cameras are being proposed
Video systems, for the direction-by-direction decision.
The cab-facing camera.
Reviewing footage, which is the workload nobody budgets.
Who can look, and for how long.
The actual goal is fewer collisions
What actually predicts a collision.
Fatigue, distraction and speed.
Driver assistance systems, which outrank coaching.
Vulnerable road users.
New drivers and agency drivers.
If you read only three
What the sensors actually measure, because the gap between measurement and conclusion is the whole subject.
The statistics that mislead, because it explains why the reports move and mean nothing.
What actually predicts a collision, because it is the honest basis for anything you promise.
A closing note
Nothing here is legal advice, and the notes say so where it matters. Requirements on monitoring, consultation and video vary substantially by jurisdiction.
No effectiveness percentages are quoted, deliberately. The published figures in this field are almost all before-and-after comparisons without control groups, and repeating them would be repeating the error the notes describe.
And this collection does not cover dispatch, routing, vehicle condition or fleet cost. Those are separate subjects.
If you have one afternoon
The shortest useful route.
Pull three years of incidents and classify them by type and by driver tenure.
No system required.
It tells you whether your problem is behaviour at all — and in many fleets it is manoeuvring damage and induction, which no amount of harsh-event detection addresses.
Connect policy and data
The choices in this note can be compared with see the documented scenario. Keep the written purpose in control and enable only the information needed at this boundary.
Independent reference
For a thematic point of reference, see the National Safety Council. Use the current material as an outside check before turning the principle into a system rule.