Chambers Flat Road Upgrade

• Project typeRoad upgrades
• Project scheduleCompleted

This major project was completed in November 2024.

If you want to find out more about the works, see Final construction notice Chambers Flat Road Upgrade(PDF, 738KB).

Project overview

With Logan’s population set to continue growing, we are investing in our roads to ensure they are fit for purpose, now and well into the future.

As a vital east-west link, this upgrade to Chambers Flat Road is improving safety, flood resilience and travel conditions for everyday users.

We have upgraded 3.8 kilometres of the road from Mount Lindesay Highway, Munruben to just north of Kings Way, Chambers Flat.

Traffic is expected to increase significantly over the next 20 years due to residential and business growth. The upgrade allows Chambers Flat Road to safely accommodate future traffic demands from local and adjoining development areas.

Chambers Flat Road currently carries approximately 19,000 vehicles a day.

This figure is expected to rise by 47 per cent to approximately 28,000 vehicles a day.

Project features

• 3.5-metre-wide traffic lanes and 3-metre-wide sealed shoulders (asphalted to provide a safer, smoother road with reduced tyre noise impacts for residents)
•  a new bridge over Norris Creek (up to 8 metres higher than the existing culvert)
• improvements to the intersections at Kings Way and Greenvale Road including dedicated turning lanes from Chambers Flat Road
• upgraded Grevillea Road and Norris Creek Road intersections
• improved sight lines at bends and crests
• new stormwater drainage
• A variety of wildlife devices including fauna fencing, escape poles, culvert crossings and nesting boxes.

Norris Creek Bridge

Modelling was undertaken during design of the new Norris Creek bridge for both local storm and regional flood events, to ensure future flooding impacts are mitigated.

According to the modelling, during a 1-in-100-year Norris Creek storm event, water levels are expected to peak below the bridge. During a 1-in-20-year Logan River flood event, backwater would push up Norris Creek from Logan River, with water levels expected to peak under the bridge road level. A more severe flood would overtop the bridge, according to the studies.

With the existing culverts removed and the bridge and associated earthworks constructed, modelling indicates no adverse impacts during events up to and including the 1-in-100-year storm and regional flood.

View the Norris Creek Bridge construction progress on Facebook

Chambers Flat Road bridge install video transcript

The height of the new bridge over Norris Creek meant that Chambers Flat Road and Greenvale Road remained open during ex-Tropical Cyclone Alfred. At its highest point, flood water only reached two thirds up the 10-metre-high pylons.

Project benefits

The upgraded road: 

• improves safety as traffic increases 
• improves sight lines for crests and curves 
• unlocks local bottlenecks for more reliable travel times 
• improves flood resilience of Chambers Flat Road and the intersections with Greenvale Road and Norris Creek Road  
• contributes to a well-managed road network to improve access and economic opportunity.

To gain a broad view of road, drainage and associated works across Logan City, please see roads, transport and infrastructure.