4D radar on highway gantry
4D Radar

Persistent vehicle tracking through speed, lane change and occlusion.

4D radar provides range, azimuth, elevation and Doppler velocity, allowing RITAIS to maintain target identity where single-sensor systems fail.

Four dimensions

From speed detection to multi-target tracking.

Legacy radar often measures presence and speed. 4D radar adds elevation and multi-target separation, making it a core MLFF sensor rather than a speed-only device.

Range (X)

Distance to target before, under and after the gantry.

Azimuth (Y)

Lateral position across lanes for lane association.

Elevation (Z)

Height dimension used to separate vehicle types and structures.

Doppler velocity (V)

Instantaneous speed per target for prediction and tracking.

Technical performance

Designed for dense, high-speed corridors.

250+ km/h

Maximum vehicle speed tracked.

64 targets

Simultaneous vehicles per sensor.

±0.1 m/s

Doppler velocity resolution.

300 m

Detection range ahead of gantry.

Radar maintains performance in rain, dust, fog and darkness, providing continuity when cameras or LiDAR degrade.

4D radar technical performance
4D radar multi-target tracking architecture
Tracking workflow

Raw FMCW → Range-Doppler → CFAR detect → Kalman track.

Each detected target receives a track ID that is associated across sensor frames, enabling identity preservation through lane changes, occlusions and dense traffic movement.

See Use Cases