Flat-Trac Comfort Roadways

Apply driver gas/brake inputs along with longitudinal and vertical excitation at each spinning tire patch of a vehicle with an active drive train on straight roads to study suspension-to-body vibration behavior or occupant ride comfort.  The dynamic version of this system can replicate sustained high accel/decel powertrain loads along with highly dynamic synthetic or road longitudinal vibration inputs with high precision and repeatability.


  • Ride / Comfort Assessment
  • Noise and Vibration Transmissibility
  • Energy Consumption
  • Drivability
  • Powertrain Tuning

Test Specimens

  • Passenger Cars and SUVs
  • Light Trucks
  • Axle-Suspension Subsystem

Key Product Features

Innovative Technology

Flat-Trac moving belts accommodate spinning tires to create real-world vehicle-to-road interface


Full-featured programming environment enables replication of all scenarios within a vehicle’s operational design domain

Accelerated Testing

Lab-based solution shifts functional verification forward in development to streamline final proving ground validation

Unmatched Expertise

Advanced hybrid simulation techniques extend comfort roadway utility into the early stages of vehicle design

Model Comparison

Comfort Roadway

  • Assess ride comfort with lightly loaded powertrain and vertical excitation
  • Longitudinal power density: 29 kW

Dynamic Comfort Roadway

  • Assess ride comfort with heavily loaded powertrain and/or dynamic longitudinal vibration inputs and vertical excitation
  • Longitudinal power density up to 280 kW

Technical Overview

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Vehicle Dynamics Showcase Lab

Higher Fidelity - Deeper Insight - Faster Development