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Transport for London, Hanger Lane Tunnel Lighting

Morson Praxis were appointed by Transport for London (TfL) to deliver a full lighting upgrade for the Hanger Lane Tunnel, a vital transport artery serving over 22 million vehicles each year.

Client Brief

Modernising a Critical London Route

Built in 1960, the Hanger Lane Tunnel sits beneath one of London’s busiest gyratories. Its lighting and control infrastructure had become outdated and unreliable, with corroded luminaires and control equipment beyond repair.
TfL required a modern, energy-efficient lighting system with intelligent controls that would enhance visibility, reduce energy consumption, and ensure long-term operational reliability — all within the tunnel’s restrictive design envelope.

Project Overview

Engineering Around Constraints

The 240-metre twin-bore tunnel, featuring two lanes in each direction, presented unique engineering challenges.
Because of the tunnel’s restricted height, all lighting had to be mounted within the existing cornices to maintain clearance. This required a bespoke optical and control solution that could deliver precise, uniform lighting without glare or wasted energy.

Image Gallery

Smart lighting for one of London’s busiest underground routes.

Our Solution

Bespoke Optics, Intelligent Control

Morson Praxis, working in partnership with TRT Lighting, designed and delivered a custom LED lighting and PLC control system tailored to the tunnel’s environment.

Key elements of the solution included:

Bespoke TRT Verso LED luminaires, designed specifically for cornice mounting to eliminate glare and simplify installation.
DALI-controlled drivers integrated into the eMaster lighting control system, ensuring precise adjustment of brightness based on real-time tunnel luminance.
Photometer-linked full dimming, allowing the system to dynamically respond to approach lighting conditions — providing exactly the right light levels and delivering up to 20% energy savings over traditional staged systems.
Dual-redundant PLC architecture for maximum system reliability.
SCADA interface enabling remote monitoring, diagnostics, and control from the operator system.

This combination of smart control technology and precision-engineered optics provides seamless integration between tunnel lighting, safety, and energy performance.