Ride & Roughness
Overview
Measure ride quality and localized roughness under prevalent standards and specifications. SSI builds systems for highways, sidewalks, and certification track
Road Pavements
We guarantee compliance of our devices with commonly used equipment standards and ride quality specifications. This includes traditional profilograph specifications and evolving specifications for IRI (International Roughness Index) are covered by SSI’s inertial profiling systems, such as the popular CS9100/CS9300 high speed profilers and versatile CS8700 lightweight profiler.
SSI’s devices extend to both asphalt and concrete pavement applications. Single point or wide beam laser configurations are available. The wide footprint profile lasers record height measurements using a 4 inch (100 mm) beam consisting of 260 points across the pavement. This wide beam alleviates the impact of grooves, tines and coarse textures by use of a “tire bridging” algorithm that distills the measurement to the riding surface (excluding the underlying texture attributes).
There are numerous additional measurement options beyond ride quality. SSI’s inertial profilers are scalable: add instrumentation incrementally to record rut depth, full lane transverse profile, cross-slope, IMU (geometry), camera (ROW or pavement surface), and 2D or 3D survey formats.
Recommended: Inertial Profilers
Recommended: Inertial Profilers
Recommended: Inertial Profilers
Recommended: Inertial Profilers
Recommended: Inertial Profilers
Recommended: Inertial Profilers
Walking Profiler
Profiles and roughness can be collected with the CS8800 Walking Profiler. The CS8800 is an inclinometer based system that collects data at a walking speed. Walking Profiler data is commonly used for certification tracks to create a benchmark to compare inertial profiler data. The repeatability of the Walking Profiler is above 99% for these tracks.
Recommended: Walking Profilers
Profilographs
SSI is the sole manufacturer of California Profilographs under ASTM E1274 and CTM 526 and CTM 547 and Bridge Profilographs under CTM 547. The hardware is assembled by SSI and run on SSI Profiler software.
Recommended: Profilographs
Recommended: Profilographs
Specifications
- Meets ASTM E950 (Class I), AASHTO M328, R054, R056-057. Passes inertial profiler certification.
- AASHTO M328 (Standard Specification for Inertial Profiler)
- ASTM E1170 Standard Practices for Simulating Vehicular Response to Longitudinal Profiles of Traveled Surfaces)
- ASTM E1274 (Standard Test Method for Measuring Pavement Using a Profilograph)
- ASTM 1926 (Standard Practice for Computing International Roughness Index of Roads from Longitudinal Profile Measurements)
- ASTM E1489 (Standard Practice for Computing Ride Number of Roads from Longitudinal Profile Measurements Made by an Inertial Profile Measuring Device)
- ASTM E2560 (Standard Specification for Data Format for Pavement Profile)
- AASHTO R043 (Standard Practice for Quantifying Roughness of Pavements)
- AASHTO R054 (Standard Practice for Accepting Pavement Ride Quality When Measured Using Inertial Profiling Systems)
- AASHTO R056 (Standard Practice for Certification of Inertial Profiling Systems)
- AASHTO R057 (Standard Practice for Operating Inertial Profiling Systems)
- World Bank Technical Paper Number 46 (Guidelines for Conducting and Calibrating Road Roughness Measurements)
- Ministry of Transport ride quality (smoothness) specifications (Example: Ontario Canada Ministry of Transport Test Method LS-296)
- State DOT ride quality (smoothness) specifications (Examples: Texas DOT Tex-1001-S, California DOT (CalTrans) Test Method 387)
- ASTM E2133 (Standard Test Method for Using a Rolling Inclinometer to Measure Longitudinal and Transverse Profiles of a Traveled Surface)
- ASTM E1486 (Standard Test Method for Determining Floor Tolerances Using Waviness, Wheel Path and Levelness Criteria (Metric)
- California Department of Transportation Test Method 526 (Operation of California Profilograph and Evaluation of Profiles) and Test Method 547 (Method of Test for Operation of Bridge Profilograph and Evaluation of Profiles)
- Collect data from a dead-stop up to 100 mph (160 kph).
- One inch (25.4 mm) sampling interval at all collection speeds
- Variable sampling interval setting for point cloud
- Integrated GPS-DMI, available with INS option
- Features LMI Technologies’ 5 kHz Gocator wide beam lasers for asphalt and concrete pavements.
- ±5g or ±10g rated Accelerometers with 0.0001g accuracy.
- Removable sensor modules mounted in wheel tracks on the front, middle, or rear of host vehicle.
- Reuse collection components on other standard or lightweight vehicles.
- Proven ability to measure wavelengths of ~0.25 feet (7.62mm) in excess of 8,000 feet (2,438 meters).