Inner City Bypass upgrade

The Inner City Bypass (ICB) upgrade will see the ICB widened from three to four lanes between Legacy Way and the RNA tunnel to increase capacity and allow for future growth along the key corridor.

BMD Constructions has been selected as the preferred contractor to design and construct the upgrade. Major construction began in March 2017. 

Fly-through video

Watch the fly-through video below to find out more about the project. Alternatively, watch the video on Council's YouTube channel.

Read supporting information for this video.

About the project

The ICB is one of Brisbane's most important routes and is integral to the city's economic growth. It is a vital link in the road network with connections to Lutwyche Road, Airport Link Tunnel, Clem Jones Tunnel, Legacy Way tunnel and the soon-to-be-upgraded Kingsford Smith Drive.

The ICB is currently operating at up to 90% capacity, however with the road now carrying more than 100,000 vehicles per weekday, the ICB will exceed capacity by 2021.

The ICB upgrade will:

  • increase capacity for existing and future traffic demands
  • improve travel times and safety for all road users
  • improve connectivity to the wider road network.

The upgrade will deliver a number of bus priority measures to improve public transport options and travel times, making it easier for people travelling to and from the western suburbs.

The upgrade includes:

  • widening the ICB westbound from three to four lanes between the westbound approach to the RNA tunnel and the Legacy Way portal
  • widening the ICB eastbound from three to four lanes between Legacy Way portal and Herston Road exit
  • construction of a new westbound ramp to the ICB from Bowen Bridge Road, allowing buses to connect directly to the ICB from the Inner Northern Busway
  • new bus priority measures at the Herston Road exit off the ICB, including a new dedicated bus priority lane.

The upgrade will also improve safety on the ICB by increasing capacity and reducing congestion-related accidents.

You can read the latest project update by downloading the:

Project map

View the project plan in your preferred format:

Bus priority measures

New and improved ICB entry and exit points will reduce travel time for buses and provide opportunities for new bus services to and from the western suburbs using Legacy Way.

The construction of a westbound ramp from Bowen Bridge Road and the Inner Northern Busway onto the ICB will allow bus services to use the Legacy Way tunnel in both directions.

A number of inbound bus services have already been re-routed to take advantage of Legacy Way.

Since the tunnel opened in 2015, bus users have experienced average journey time savings of up to 13 minutes and patronage has also increased by 40% on inbound bus services.

The new westbound on-ramp will provide similar travel time savings for buses heading towards the western suburbs, allowing buses to interchange with the Inner Northern Busway and the planned Brisbane Metro.

Project timing - design and construction 

BMD Constructions was selected as the preferred contractor to design and construct the ICB upgrade.

Initial works on the upgrade began in December 2016. Major construction activities started in early  2017.

The upgrade is expected to be completed mid-2018.

Project benefits

The ICB upgrade will increase capacity and accommodate future growth along this key corridor.

The upgrade will:

  • improve travel times
  • reduce traffic congestion
  • improve public transport facilities
  • improve safety for all road users
  • improve connectivity to Legacy Way and the wider road network.

Project impacts

Council is committed to minimising impacts on the local environment during the construction of the upgrade and will ensure all affected areas are reinstated in a way that respects the history and character of the local area.

As was the case when the ICB was first constructed in 2001, some tree removal will be required to accommodate the upgrade due to limited space available for construction activities. Existing trees will be retained where possible.

Several existing fig trees will be kept and transplanted in the local area along with a selection of new advanced fig, jacaranda and flame trees. Approximately 700 lilly pilly trees will also be planted to provide screening adjacent to the ICB. In addition, low level shrubs will be planted to retain and enhance the green outlook of the area for both the community and road users.

Council will also undertake further tree planting and landscaping works throughout Victoria Park to supplement the project's offset planing and leave a lasting legacy for future generations.

Transurban Queensland

Transurban Queensland approached Council in late 2015  with an innovative proposal to deliver the ICB upgrade and provide ongoing incident response, routine maintenance and operational support. This proposal was then assessed under Council's Innovative Proposals Policy.

Council has reached an agreement with Transurban Queensland to fund and deliver the ICB upgrade and to take over responsibility for the ongoing maintenance and operations of the ICB. As part of this agreement, Transurban Queensland will manage the routine maintenance for the ICB and provide ongoing operational and incident response support on the ICB and its surrounding road network.

Transurban currently operates Legacy Way Clem7 and Airport Link. This company's experience in maintaining and operating the road network surrounding the ICB means it is uniquely positioned to assist Council in responding to incidents to help improve traffic flow and safety outcomes on the ICB.

Transurban Queensland's proposal provides benefits to both ICB users and Brisbane's broader traffic network, represents value for money for Brisbane's rate payers and will generate significant savings to Council.

Council's assessment report of Transurban Queensland's Innovative Proposal provides more information on this agreement. Read this report:

More information

For more information about the design and construction of the ICB upgrade:

  • phone the project team on 1800 870 437 during business hours 
  • phone Council on 07 3403 8888 after hours 
  • email the project team
  • write to the project team:
    Inner City Bypass upgrade project
    Brisbane City Council
    GPO Box 1434
    Brisbane Qld 4001
21 April 2017