Tools

Austroads 26 May 2026

Safe System Treatment Selection Tool

Cyclist Crashes Cyclists Head-On Crashes Heavy Vehicle Occupants Local Streets Micro-Mobility Motorcyclist Crashes Motorcyclists Other Crashes Passenger Vehicle Occupants Pedestrian Crashes Pedestrians Safe Speeds Safe Vehicles Treatments

The Safe System Treatment Selection Tool (SSTST) helps practitioners choose road safety treatments that are aligned with Safe System principles and matched to the crash patterns at a given location. It is structured around the four Safe System pillars (safe roads, safe speeds, safe vehicles, safe road users) and links each treatment to its evidence base, indicative cost, and expected crash-reduction performance. SSTST is intended for use during option development and value-management workshops, not as a black-box recommendation engine.

In practice, SSTST guides you through a structured, repeatable assessment so options can be compared and prioritised consistently.

  • Screens and ranks options using an evidence-based method.
  • Links each option to indicative cost and expected crash-reduction benefit.
  • Produces defensible outputs for funding submissions and prioritisation.
View more about this topic

Provides evidence-based scoring and ranking to support treatment selection, investment prioritisation, and network-wide decision-making.

Use SSTST when you need to:

Use SSTST when evaluating treatment options for a known crash problem, comparing alternative project scopes against a fixed safety target, or building a long list of treatments to discuss with stakeholders. It is most powerful when paired with a Crash Analysis or Safe System Assessment so the inputs (crash pattern, road context, exposure) are well characterised. The tool surfaces options that the practitioner then evaluates; it does not replace engineering judgement.

The tool is delivered as a web application. Typical workflow:

Open SSTST in a browser, identify the crash type and road environment you are working with, browse the catalogue of treatment options grouped by Safe System pillar, and shortlist preferred options based on expected effectiveness, cost, and constructability. Export the shortlist as a structured comparison sheet ready to take into a project workshop or funding case.

Guides & Manuals

Supporting documentation for SSTST users.

Quick User Guide
A short guide that walks practitioners through the SSTST interface and workflow.
View Report →
SSTST Manual
The full technical manual covering the SSTST model, calibration, and output interpretation.
View PDF →
Can’t find what you’re looking for? Let us know.
Get in touch →