Grantham Street Multi-Intersection Treatment Review and Evaluation

  • Project scheduleReview & Evaluation
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Last Updated: 08/12/2025

Background

Between 2017 and 2021, the Grantham Street intersections with Jersey Street and Pangbourne Street recorded 31 and eight reported crashes respectively. Following technical investigations and community consultation, Council endorsed a multi-intersection treatment fully funded through the Federal Black Spot Program and installed in April 2024.

Grantham Street and Jersey Street Intersection

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Grantham Street and Pangbourne Street Intersection

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July 2025 Evaluation and Community Feedback

An initial evaluation report was prepared for the July 2025 Ordinary Council Meeting, but was withdrawn to allow the Administration to respond to feedback from the community and Elected Members.

Key issues raised included:

  • Requests for clearer explanation of the technical data.
  • Concerns regarding the timing of the April–May 2025 traffic surveys, compared to the February 2022 baseline.
  • Interest in reconsidering traffic signals as a potential future intersection treatment.

Current Status

The Administration is revising the July 2025 draft report to provide clearer technical explanations, incorporate updated crash data, and address key questions raised by the community.

At the December 2025 Ordinary Council meeting an item is being considered to extend the timeframe and complete further data collection and give the community more time to provide feedback. The report can be found in the Related Information section at the top to this page or within the Agenda & Minutes page of the Town’s website.

The revised Officer’s Report will be released in April 2026 for community comment and presented to Council at the May 2026 Ordinary Council Meeting.

Consideration of Traffic Signals

In response to community and Elected Member feedback, the Town has re-engaged with Main Roads WA (MRWA) and commenced the Traffic Signal Approval Process – Stage 1 (TSAP1).

Key points about the TSAP process:

  • TSAP1 assesses feasibility, traffic volumes, capacity and operational suitability.
  • A successful TSAP1 outcome provides in-principle support for traffic signals only.
  • Council is not required to proceed beyond any stage.
  • MRWA feedback on TSAP1 is expected February 2026.

Progressing TSAP1 does not predetermine a decision to install traffic signals; it ensures Council has complete technical information should signals be considered in future.

Traffic Survey Clarification

Two rounds of post-implementation traffic surveys were undertaken in April (6–12) and May (4–10) 2025. The Town’s consultant confirmed that:

  • The data is representative of typical conditions, with variation between sets limited to only 2–4%
  • Volume data obtained from nearby signalised intersections in February 2025 was consistent with volumes recorded in April and May 2025.
  • The timing difference from February and the April/May surveys is unlikely to influence the comparison.

However, to address community concerns, the Administration is recommending undertaking additional traffic surveys in February 2026, to align with the original pre-treatment survey period. This will provide a clear before-and-after comparison and a more robust dataset for final evaluation

Next Steps

Now – February 2026

  • Lodgement and assessment of the TSAP1 application
  • TSAP1 feedback expected February 2026

February 2026

  • Undertake new traffic surveys aligned with the February 2022 pre-trial baseline

March 2026

  • Incorporate updated MRWA crash data

April 2026

  • Release the revised Officer’s Report for four weeks of public comment
  • Promote opportunities for community feedback

May 2026

  • Present the updated evaluation report to the May 2026 Ordinary Council Meeting, incorporating:
    • TSAP1 outcome
    • February 2026 survey results
    • Updated crash data
    • Community feedback

How the Community Can Be Involved

The Town is committed to a transparent and evidence-based evaluation process. Community members will have opportunities to:

Updates will continue to be provided on this webpage and through the Town’s communication channels, including the Elected Member Information Bulletin.

Please check back on this webpage for future updates.

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