01 · CALIBRATE
Four points, real geometry
A through D define a spatial road rectangle. LiDAR provides length, width and metric scale.
LiDAR · COMPUTER VISION · ON DEVICE
Speed check in your pocket!
Vmax check combines LiDAR calibration, calm target/current alignment, and local vehicle detection on iPhone. Plausible partial tracks become transparent speed estimates.
THE CURRENT APP
The workflow stays visible.
From route setup and calm target/current alignment to a clearly labelled estimate, the app shows how each result is produced.
On deviceNo measurement backend
LiDARMetric route
A–DGuided calibration
iPhone ProiOS 18 or later
THE APP
One field.
Multiple visible points.
No rigid light gate: Vmax check uses all plausible vehicle positions within the visible part of the calibrated road section.
02 · ALIGN
Match target and current view
A dashed target outline and the yellow live field show how closely the current view matches the saved observation point.
03 · MEASURE
Partial route, not silent rejection
Consistent vehicle positions are combined robustly. Uncertain results remain clearly labelled as estimates with a quality status.
LOG
Inspect every result
Speed, direction, partial distance, image points, quality status, and the best vehicle image remain available locally.
PRIVATE
Local instead of cloud
Camera, LiDAR and location data are not sent to a measurement backend for core functionality.
MOBILE
No fixed mount
The workflow is designed for a handheld compatible iPhone Pro in portrait orientation.
THREE STEPS
From road to measurement field.
Create a route profile
Save its name and local speed limit.
Capture the observation point
Save the future camera position with the road and distinctive surroundings.
Measure route A–D
Walk from A to B on the right, cross only when safe, then return from C to D on the left. The profile can then be reused.
Vmax check is not calibrated or approved for official or legally binding speed measurements. Never configure or operate the app while standing in moving traffic.