Bacchus Marsh Intersection Upgrades
Big Build Roads is upgrading two major intersections in Bacchus Marsh on behalf of Transport Victoria.
Underway
Griffith Street Closure – School holidays works
We’ll be working day and night for two weeks over the school holidays at the Station Street/Griffith Street and Grant Street/Parwan Road roundabout to complete upgrade works.
Works include:
- drainage works
- installing traffic signals
- installing pavements and kerb
- site investigations and relocating utility services.
To complete these works safely, we’ll close Griffith Street in both directions between Franklin Street and Grant Street from 8pm, Sunday 28 June to 6am, Monday 13 July 2026.
Detours will be in place
Griffith Street Closure - From 8pm, Sunday 28 June until 6am, Monday 13 July 2026
South Maddingley Road closure - from Wednesday 8 July to Friday 10 July, 7pm to 6am each night and then overnight, at times in 2026
Major works continuing
Main Street and Grant Street intersection
We’re continuing to upgrade the Main Street and Grant Street/Gisborne Road intersection to replace the existing roundabout with traffic lights and signalised pedestrian crossings.
These works include:
- site investigations
- relocating utilities services
- removal of tree stumps along Grant Street and Main Street
- removing kerbs
- excavation, drainage and road widening works
- traffic signal installation
- construction of pavement
- bus bay shelter connection works
Station Street and Griffiths Street Intersection
We’re continuing to upgrade the Station Street/Griffith Street and Grant Street/Parwan Road Intersection by:
- replacing the existing single lane roundabout with a dual lane roundabout
- adding pedestrian crossings at Griffith Street and Parwan Road
- introducing a right turn ban for vehicles travelling from South Maddingley Road onto Parwan Road.
This includes:
- site investigations of utility services
- removing the existing roundabout and islands
- undertaking drainage works
- installing a new pedestrian crossing near the school
- road widening works
- construction of the roundabout
- installing pavements
Traffic Impacts
Where possible, traffic will be maintained in both directions under changed conditions, including lane closures, footpath closures and reduced speeds, at the following locations:
- Main Street and Grant Street roundabout
- Griffiths Street and Station Street roundabout
However, we’ll need to close sections of the roundabouts at times overnight in 2026 to safely complete the works. Detours will be in place, please check the detour maps below.
Some of these works will require temporary changed parking conditions along sections of Grant Street and Main Street at night.
These works require specific weather conditions and may need to be rescheduled at short notice. Please visit bigbuild.vic.gov.au/disruptions or refer to roadside messaging for specific dates, times and detours.
Main Street Closure – Overnight, at times in 2026
Grant Street closure in Maddingley– Overnight, at times in 2026
Station Street closure– Overnight, at times in 2026
Griffith Street closure – Overnight, at times in 2026
Parwan Road closure (including South Maddingley Road) – Overnight, at times in 2026
South Maddingley Road closure - Overnight, at times in 2026
How this may impact you
Working hours
Most of these activities will take place at night from Sunday to Thursday between 8pm and 6am to minimise disruption to the community, road users and businesses.
Day works will occur between 7am and 6pm, Monday to Friday, and on Saturdays between 7am and 1pm.
These works are expected to generate some noise, dust and vibrations. We’ll monitor these impacts to ensure they’re kept to a minimum.
We'll work closely with impacted businesses and residents to provide additional information on works, timing and how we propose to manage the expected disruptions.
Access to businesses and driveways will be maintained at all times.
Two intersections in Bacchus Marsh will be upgraded at:
- Station Street/Griffith Street, and
- Grant Street/Parwan Road.
The intersection upgrades will improve road safety, enhance traffic flow, reduce congestion, and provide better crossing opportunities for pedestrians and cyclists. It will also improve access to the Bacchus Marsh Station precinct.
This upgrade will ensure that the intersections are prepared to handle increased traffic volumes for the next decade.
Station Street/Griffith Street Intersection and Grant Street/Parwan Road
The upgrade will:
- replace the existing single lane roundabout with a dual lane roundabout
- add pedestrian crossings at Griffith Street and Parwan Road
- introduce a right turn ban for vehicles travelling from South Maddingley Road onto Parwan Road.
Refer to the map below to see what we’re doing:
Download a version of the overview map
Main Street and Grant Street/Gisborne Road Intersection
The upgrade will:
- replace the existing roundabout with traffic lights
- remove the existing pedestrian crossing on Gisborne Road, north of the Grant Street/Gisborne Road and Main Street intersection.
Refer to the map below to see what we’re doing:
Download a version of the overview map
To deliver the intersection upgrade, we need to remove some car spaces on Grant and Main streets. Removing parking will create the space needed to improve the intersection and add new turning lanes. The amount of car parks to be removed is still being confirmed.
Construction timeline
2026
- Late April – Site set up/ establishment
- Early May – Early works at Main Street intersection
- Mid May – Early works at Station Street intersection
- June to December – Main works underway
2027
- Early 2027 – Project completion
Sign up for updates
Sign up for email and SMS updates on the Big Build website to keep informed as our planning progresses or text BACCHUS to 0499 073 073 .
Get in touch
To find out more about this project, please contact Big Build Roads.
Email: [email protected]
Call: 1800 105 105