London’s highly successful Docklands Light Railway (DLR) was extended south under the River Thames to Lewisham and is now being extended out to London’s City Airport and to the Woolwich Arsenal.

Halcrow was appointed to carry out the feasibility study for the extension to Lewisham, its preliminary engineering and the development of the design to enable the appropriate statutory powers to be obtained. For the London City Airport Extension, Halcrow is preparing a tender design for CARE, the consortium of AMEC and the Royal Bank of Scotland, for the £300 million concession to build and maintain the airport extension for 30 years.

The extension to the Woolwich Arsenal involves a new 2km length of tunnel passing beneath the Thames, together with a new underground station. Halcrow, appointed by contractors AMEC, is currently developing all aspects of the tender design, including tunnel design and alignment, station design, M & E services, fire and life safety systems and tunnel and station ventilation design.

In particular, Halcrow has developed the following project inputs:

	fire risk assessment
	escape and evacuation analysis
	ventilation and smoke control strategy