Survey quality
IRI in South Africa: what the number tells you—and what to check next
Follow quarter-car equations, suspension travel and amplitude sensitivity, then interpret roughness with section and measurement-quality evidence.
11 min read
Survey to Deliverable
TMH / TRH / COTO
Road survey data in.
Structured deliverables out.
Bring GPS, road profiles, FWD measurements and visual condition evidence into a traceable workflow for pavement engineers and asset managers.
Client Deliverables
TMH 18 CID • IRI Reports • Named Frames • Road Link Packages
Standards & References
TMH 18 • TRH 12 • COTO • SAPEM
RoadSense
Video → Frames
Extract GPS-tagged images every 5m along the route
GPS → Chainage
Convert coordinates to distance along the road
Sensor → Metrics
IRI, rut depth, MPD and FWD parsed from 12 survey and GPS file types
Map Review
Inspect GPS tracks, frames & metrics on one map
Condition Rating
TMH 9 visual assessment — distress type, degree & extent
IRI Classification
Measurement context and project interpretation rules
Multi-user with Roles & Full Audit Trail
Managers, technicians, assessors, clients — key actions logged with user, time and IP
Field Data Collection
Video Stream Data
GPS / GNSS
Profiler (IRI / FWD)
Roughometer
Visual Assessment
Route Shapefiles
Aligned with
Full reference →
Reference library
Standards, explained in depth
Read source scope, interpretation limits and worked educational examples for road assessment methods.
TMH 13 — IRI roughness
Longitudinal profile, the IRI reference model and measurement context.
TMH 18 — Combined Instrument Data
Combined instrument data exchange; confirm the receiving authority’s version.
TRH 12 — rehabilitation
Investigation evidence and the rehabilitation design process.
SAPEM — texture & skid
Keep the test method, units and conditions with each texture or skid result.
Horak 2008 — FWD deflection
Deflection bowl parameters D0, BLI, MLI, LLI.
12,555 km
Road network managed
861
Roads in client networks
Production platform figures as at 27 July 2026.
Data Pipeline
Capture, process, and deliver — without the headaches
Raw field data flows through automated processing stages and emerges as structured engineering deliverables. Here's what happens at every step.
Ready to see it on your data?
RoadSense is invitation-only. Tell us about your survey operations and we'll set up your organisation.