Connected LED tunnel lighting fit for the world’s leading busway

bahn tunnel

Lighting up the O-Bahn tunnel

Stretching 12 km, Adelaide’s O-Bahn is the longest and fastest guided bus service in the world. Although hugely successful, the South Australian Department of Planning, Transport and Infrastructure identified a need to reduce traffic congestion from O-Bahn buses traveling in and out of the city centre.

The O-Bahn tunnel was the first in Australia to use 100% LED lighting – allowing us to streamline maintenance, improve safety and reliability, and reduce operating costs. We wanted to set the standard for tunnel lighting in Australia – and that’s exactly what we’ve done.
Sandip Bhavasar, Senior Project Engineer at McConnell Dowell
Bahn tunnel lighting
Bahn tunnel customer challenge

Customer challenge

The O-Bahn City Access Project was tasked with improving safety and travel times. One of a range of initiatives, the bus-only tunnel was extended by 140 metres, to a total of 670. Carrying over 30,000 passengers a day, the tunnel required a lighting solution that streamlined maintenance and ensured commuter and driver safety – all while adhering to strict standards for public lighting.

The right lighting

Signify was part of a multidisciplinary team – spanning lighting design, engineering, installation and commissioning – that took on the project. Collaborative and committed, the partnership ensured the project met all time and budget requirements while also navigating complex safety regulations and environmental considerations. Safety was core to our design and product selection.

We used high-quality Philips LED luminaires and controls throughout. Meanwhile, Philips TubePoint, specifically designed for lighting tunnels, provides high visibility within the O-Bahn tunnel while eliminating the ‘black hole effect’. To ensure a smooth driving experience, we designed bespoke road lighting for the tunnel entry and exits. Here, we used Philips Luma LED lighting to deliver ideal light distribution, minimize glare and light wastage, and reduce light pollution.

By integrating all tunnel and architectural LED luminaires with the Philips Dynalite control system, we gave the Department full visibility of the lighting and energy management system status and performance. These include reduced upkeep requirements, streamlined preventative maintenance, improved safety, and minimized downtime.


Benefits Lebendige Stadt

ColorBurst IntelliHue Powercore

Exterior architectural and landscape spotlight with intelligent white and color light.

iPlayer 3

Author, configure, and control dynamic LED light shows for DMX lighting networks.


MultiMaster DALI Driver Controller

Enabling a full DALI universe including tunable white drivers, DALI sensors and user interfaces.

Tunnel Lighting for busway

Tunnel Lighting for busway

The team


Government of South Australia Department of Planning, Transport and Infrastructure

Lighting designer

Tunnel Lighting Design and Ramp Lighting - Rob Pullin, WorkLight 

Portal architecture decorative conceptual design - Rob Shenstone, Signify

Design renders - WorkLight 

Programming - AutomateNow


McConnell Dowell

Value Added Partner

Automate Now