Measure roughness, rut depth, and surface texture with GPS-referenced outputs
using 5- and 17-laser systems for high-resolution inertial profiling.

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HST offers high-accuracy inertial profiling services using both 5-laser and 17-laser profilometers, adaptable to the scope and requirements of each project and able to provide continuous, chainage-referenced data at survey speeds, including:

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International Roughness Index (IRI) measured in both wheel paths for ride quality and surface regularity.
Rutting (RUT) transverse profile measurements across the lane to identify wheel-path deformations.
Macrotexture (MPD) mean profile depth for skid resistance and surface texture evaluation
Longitudinal Profiles raw profile outputs for engineering analysis and compliance checks.
GPS accurate GPS co-ordinates which are chainage referenced.
ROW HD Imagery of up to 3 camera positions, including front, rear and service.

Deliverables

Data processed into 10 m intervals with 100m summary reports.
Excel outputs for detailed review and integration into client systems.
KMZ files for mapping in Google Earth (with optional line colouring by parameter values).
Chainage and GPS-referenced outputs aligned to project control.
RSP systems provide continuous, chainage-referenced data at survey speeds.

Compliance & Standards

Fully compliant with COTO for surface regularity.
Conforms to TMH requirements.
Equipment is calibrated and verified regularly to ensure accuracy.

Benefits

Reliable data for contractor quality control and client acceptance checks.
Rapid data collection with minimal traffic disruption.
Detailed reporting to support maintenance strategies and pavement performance assessments.

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Falling Weight Deflectometer

HST provides structural pavement evaluation using specialised FWD equipment, capable of simulating wheel loads by applying dynamic impulses to the pavement surface.

This allows us to measure the resulting pavement deflections and its ability to carry traffic loads. These systems allow us to capture the following parameters:

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Sensor Configuration of 9 and 11 sensors are available.
Deflection Bowl Measurements using geophones at fixed offsets (0–1800 mm) to capture the pavement’s load response.
Maximum Surface Deflection (D0) for assessing overall pavement stiffness.
Deflection Basin Shape Parameters (BLI, MLI, LLI) used in back-calculation of individual layer moduli.
Load Levels applied loads typically ranging from 40 kN (light traffic roads) to 120–150 kN (heavy-duty routes and airports).

Deliverables

Raw deflection data and load-response files in Excel formatting.
.f25 files compliant with SANRAL requirements for network and project-level submissions.
Chainage referenced GPS files in a .kmz format

Compliance & Standards

Fully compliant with TMH.
Equipment calibrated at approved calibration centres.
Adheres to SANRAL and COTO specifications for structural pavement evaluation.

Benefits

Determines residual life of pavements and identifies rehabilitation needs.
Validates as-built construction quality of new road layers.
Provides input for pavement design models and mechanistic-empirical design methods.
Supports cost-effective maintenance planning by accurately identifying structural weaknesses.
Enables rapid mobilisation and testing with minimal traffic disruption.

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Expert Advisory Services

Beyond data collection, HST provides expert advisory services that transform test results into actionable engineering decisions.

With combined experience in civil engineering, pavement material science, and laboratory management, our team supports clients in:

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Pavement design reviews and optimisation
Data interpretation and reporting
Compliance with SANRAL and COTO specifications
Cost-effective maintenance and rehabilitation planning
Tender support and technical advisory

We are committed to helping clients not only collect data, but also use it strategically to improve asset performance, reduce lifecycle costs, and ensure compliance with industry standards.

Falling Weight Deflectometer

Expert Advisory Services

Measure roughness, rut depth, and surface texture with GPS-referenced outputs using 5- and 17-laser systems for high-resolution inertial profiling.

HST offers high-accuracy inertial profiling services using both 5-laser and 17-laser profilometers, adaptable to the scope and requirements of each project and able to provide continuous, chainage-referenced data at survey speeds, including:

Fully compliant with COTO for surface regularity. Conforms to TMH requirements. Equipment is calibrated and verified regularly to ensure accuracy.

Reliable data for contractor quality control and client acceptance checks. Rapid data collection with minimal traffic disruption. Detailed reporting to support maintenance strategies and pavement performance assessments.

HST provides structural pavement evaluation using specialised FWD equipment, capable of simulating wheel loads by applying dynamic impulses to the pavement surface.

This allows us to measure the resulting pavement deflections and its ability to carry traffic loads. These systems allow us to capture the following parameters:

Raw deflection data and load-response files in Excel formatting. .f25 files compliant with SANRAL requirements for network and project-level submissions. Chainage referenced GPS files in a .kmz format

Fully compliant with TMH. Equipment calibrated at approved calibration centres. Adheres to SANRAL and COTO specifications for structural pavement evaluation.

Beyond data collection, HST provides expert advisory services that transform test results into actionable engineering decisions.

With combined experience in civil engineering, pavement material science, and laboratory management, our team supports clients in:

Pavement design reviews and optimisation Data interpretation and reporting Compliance with SANRAL and COTO specifications Cost-effective maintenance and rehabilitation planning Tender support and technical advisory

We are committed to helping clients not only collect data, but also use it strategically to improve asset performance, reduce lifecycle costs, and ensure compliance with industry standards.

Measure roughness, rut depth, and surface texture with GPS-referenced outputs
using 5- and 17-laser systems for high-resolution inertial profiling.

Fully compliant with COTO for surface regularity.
Conforms to TMH requirements.
Equipment is calibrated and verified regularly to ensure accuracy.

Reliable data for contractor quality control and client acceptance checks.
Rapid data collection with minimal traffic disruption.
Detailed reporting to support maintenance strategies and pavement performance assessments.

Raw deflection data and load-response files in Excel formatting.
.f25 files compliant with SANRAL requirements for network and project-level submissions.
Chainage referenced GPS files in a .kmz format

Fully compliant with TMH.
Equipment calibrated at approved calibration centres.
Adheres to SANRAL and COTO specifications for structural pavement evaluation.

Pavement design reviews and optimisation
Data interpretation and reporting
Compliance with SANRAL and COTO specifications
Cost-effective maintenance and rehabilitation planning
Tender support and technical advisory