Smart city - Near miss analysis for streets and intersections
A near miss is a moment when two road users nearly collide and no one is hurt, so it never reaches your crash records. In a pilot, ConductVision can be set up to flag these moments on your camera system, for your team to review.
What gets flagged
Each flagged near miss comes with a short clip and these details.
Who was involved
A vehicle and a person on foot, a vehicle and a rider, or two vehicles.
Where it happened
The approach and the movement, such as a left turn across a crosswalk.
How close it was
The time between the two road users, using the measures below.
When it happened
The time of day, so your team can look for a pattern.
The measures traffic engineers use
Road safety researchers use both, and federal research describes conflict analysis "as a surrogate measure of actual crash data." Neither needs a crash to have happened.
Time to collision
How long until two road users would collide if both kept the same speed and path.
Post-encroachment time
The time between one road user leaving a point and the next one reaching it.
How to read a flag
A flagged near miss is a reason to look at a location. It is not a prediction of crashes. Near misses add to your crash records. They do not replace them.
Who decides
Your engineers decide what each flag means and what to do about it.
After dark
Night results depend on the camera and the lighting, so the first look includes night footage from each camera. The report states the hours it covers.
What it does not do
ConductVision does not warn drivers or people crossing, control signals or issue tickets.
How federal research defines a conflict
An observable situation in which two or more road users approach each other in time and space to such an extent that there is risk of collision if their movements remain unchanged.
Pilot - How a pilot starts
A paid pilot covers one intersection or one corridor. Your team sets the criteria before any results come in. You decide whether to roll out, change the scope or stop.
- You bring
- Recorded video from the cameras at one intersection or corridor, and your crash records for that location. A first look at your footage shows whether the camera views will work.
- We set up
- ConductVision for your camera views. A measure that is right at one camera may not be right at the next, so before results go out a ConductVision engineer measures a sample from each camera by hand to check them.
- You get
- Flagged near misses, each with a clip, and a final report on whether the pilot met the criteria your team set.
Related pages
- Possible conflictsVehicles and people on course to meet, flagged for review.
- Intersection safetyTurns, crossings and queues, by approach.
- Pedestrian safetyCrossings, yielding and where people actually cross.
- Before and after studiesMeasure a street before and after a change.
- Road safety researchVideo studies from the first question to the report.
- Sample street reviewWhat you get at the end of a street pilot.
- Privacy and public camerasWhat happens to street video.