Outdoor Rain Plant

for AD/ADAS testing in rain

Highly complex and dynamic AD and ADAS testing scenarios in rain. Realistic and reproducible at the push of a button!

Rain affects the performance of sensors such as LiDAR, Radar and Camera. These must be validated and tested under realistic rain conditions to ensure their function reliably and safely in real-world use.
Natural rain is not ideal for the systematic and reproducible testing of AD and ADAS systems due to its rapidly changing intensity.
Precise test results and data can only be achieved with consistent rain volumes and a homogeneous drop size distribution.
With the Outdoor Rain Plant at the Digitrans Test Center for Automated Driving, we now offer a realistic and reproducible solution for rain simulation for AD and ADAS testing.

This makes your testing scenarios easier to plan and your test data more precise.

Outdoor Rain Plant for AD/ADAS testing in rain

Outdoor Rain Plant overview

State-of-the-art road weather station

High-end road weather information system (RWIS) providing prevailing weather conditions

  • Air temperature, air pressure, humidity
  • Road conditions (road temperature, water film thickness, road condition)
  • Wind speed and direction
  • Precipitation intensity and type

Video system

Video system for video analysis and test documentation

  • 7 color cameras along the steel structure
  • 4 rotatable cameras
  • Programmable motion control
  • Resolution: 1920x1080HD

Lighting system

Lighting system along the rain plant and at the intersection

  • 11 dimmable LED street lights
  • Maximum luminous flux: 15,597 lm
  • Lighting classes: M1-M6
  • Lighting also for EURO NCAP tests

Patented rain system

Lifelike replication of real rain conditions

  • Light rain: variable between 20 and 30 mm/hour
  • Heavy rain: 100 mm/hour
  • Realistic raindrop size distribution
  • Homogeneous across the entire test area
  • Consistent and reproducible testing environment

Road markings

Different road markings to test recognizability in rain and wet conditions

  • Structural and surface markings
  • Flexible road markings
  • Crosswalks
  • Edge markings
  • Center lines and direction arrows

Intelligent traffic light system

  • Controllable traffic light system with flexible phase control
  • C-ITS interface for communication with vehicles

Intersection

  • T-intersection under rain
  • Pedestrian crossing
  • Traffic light system

Lanes

  • 2 lanes in light rain
  • 4 lanes in heavy rain
State of the Art Straßenwetterstation
Hochmoderne Straßenwetterstation

State-of-the-art road weather station

High-end road weather information system (RWIS) providing prevailing weather conditions

  • Air temperature, air pressure, humidity
  • Road conditions (road temperature, water film thickness, road condition)
  • Wind speed and direction
  • Precipitation intensity and type
Videoanlage
Videoanalyse
Videoanlage 02
Beregnung Teststrecke

Video system

Video system for video analysis and test documentation

  • 7 color cameras along the steel structure
  • 4 rotatable cameras
  • Programmable motion control
  • Resolution: 1920x1080HD
Beregnung Beleuchtungsanlage
Teststrecke Beleuchtungsanlage
LED Straßenbeleuchtung

Lighting system

Lighting system along the rain plant and at the intersection

  • 11 dimmable LED street lights
  • Maximum luminous flux: 15,597 lm
  • Lighting classes: M1-M6
  • Lighting also for EURO NCAP tests
Beregnung Beleuchtungsanlage
Teststrecke Beleuchtungsanlage
LED Straßenbeleuchtung

Lighting system

Lighting system along the rain plant and at the intersection

  • 11 dimmable LED street lights
  • Maximum luminous flux: 15,597 lm
  • Lighting classes: M1-M6
  • Lighting also for EURO NCAP tests
Homogener Regen Autonomes Fahren
Naturgetreuer Regen ADAS Tests
Realistischer Regen Autonomes Fahren
Teststrecke Beregnung ADAS Tests
Teststrecke Beregnung Autonomes Fahren

Patented rain system

Lifelike replication of real rain conditions
  • Light rain: variable between 20 and 30 mm/hour
  • Heavy rain: 100 mm/hour
  • Realistic raindrop size distribution
  • Homogeneous across the entire test area
  • Consistent and reproducible testing environment
Strukturmarkierung Teststrecke Swarco
Teststrecke Fußgängerübergang
Teststrecke Markierungssystem Swarco
Beregnung Teststrecke Markierung Swarco

Road markings

Different road markings to test recognizability in rain and wet conditions
  • Structural and surface markings
  • Flexible road markings
  • Crosswalks
  • Edge markings
  • Center lines and direction arrows
Ampel Beregnung Teststrecke
Teststrecke Kreuzung Ampelanlage

Intelligent traffic light system

  • Controllable traffic light system with flexible phase control
  • C-ITS interface for communication with vehicles
Teststrecke ADAS Test Kreuzung
Teststrecke Beregnete Kreuzung

Intersection

  • T-intersection under rain
  • Pedestrian crossing
  • Traffic light system
Autonomes Fahren Beregnung Fahrstreifen
Beregnung 4 Fahrstreifen
Beregnung Fahrstreifen Teststrecke

Lanes

  • 2 lanes in light rain
  • 4 lanes in heavy rain
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light rain
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heavy rain
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Testing AD/ADAS systems and autonomous driving in rain

Unique testing opportunities in rain

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Realistic, reproducible, and
homogeneous rain – at the push of a button!

  • Detailed replication of realistic rain conditions
  • Natural droplet size distribution
  • Consistently reproducible testing environment
  • Homogeneity across the entire test area
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High-dynamic testing scenarios
on up to 4 lanes

  • Speeds up to 120 km/h
  • Realistic spray and water splash
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Scenario variety with multiple road users

  • Complex testing scenarios in rain: overtaking, lane changes, merging
  • Up to 4 lanes usable simultaneously with multiple vehicles
  • Complex intersection scenarios with multiple road users
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Rainy intersection – Extended testing scenarios with
Vulnerable Road Users (VRU)

  • T-intersection under rain
  • Pedestrian crossing / zebra crossing
  • Traffic light system with C-ITS interface
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Lighting system with 11 dimmable LED street lights

  • High-end lighting system across the entire test area
  • Sunset headlights for tests with simulated glare
  • Lighting also for EURO NCAP tests

Rain simulation for perfect testing:

Our Outdoor Rain Plant in action!

AD/ADAS - testing systems and autonomous driving in the rain

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Applications of the Outdoor Rain Plant

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