Alstoms Smartlock solution will equip three new
relay interlockings in the Southampton area

The methodology being applied is known as interfaced
interlocking. The life-expired interlockings are
replaced with the new interlocking system and is then
interfaced with the existing trackside equipment which is left
in place. This technique forms a key part of Network Rail's
plans for resignalling projects in the UK, as it offers
significant advantages over entire replacement schemes in terms
of rapidity of installation, lower costs and less disruption to
the railway. Furthermore, the Smartlock interlocking technology
gives the potential for ERTMS to be overlaid at a later date if
required.

Between 24 and 29 December 2009, Signalling Solutions Ltd
carried out some early works on the Southampton project,
installing and testing interlocking tie cables. Final
commissioning of the new relay interlockings is planned in
April 2011.

This is the third interfaced interlocking contract awarded to
Signalling Solutions Ltd in the last three months, following
closely on from the award of contracts for projects based at
Hitchin and Great Chesterford.

About Signalling Solutions Ltd
Signalling Solutions Ltd is a 50-50 joint venture company
formed by Alstom Transport and Balfour Beatty Rail Projects.
Launched in October 2007, Signalling Solutions is the UK and
Irelands sole channel for signalling products and
systems previously supplied by the parent companies. Signalling
Solutions collective in-house expertise offers a
complete range of capabilities including planning, design,
product supply, installation, testing and commissioning for all
types of railways.

About Smartlock interlocking products
Smartlock interlocking products contribute to making traffic
safe. They enable infrastructure managers to manage their
operations efficiently, in complete safety, for optimum
productivity. Since 1997, 17 computerized control units have
been supplied to Réseau Ferré de France (RFF)
including that of Strasbourg (France) in 2006, the largest
computerized control unit in Europe. In May 2009, one of the
first super-integrated control centers operating in Europe has
been delivered in Bologna (Italy). It includes management of
complex infrastructure (8 lines and 29 stations), 300 beacons,
600 different signals, 1 400 main routes and 1 700 shunting
routes.

About Alstom Transport
A promoter of sustainable mobility, Alstom Transport develops
and markets the most complete range of systems, equipment and
services in the railway sector. Alstom Transport manages entire
transport systems, taking in rolling stock, signalling and
infrastructure, and offers turnkey solutions.
Alstom Transport recorded sales of 5.7 billion euros in the
fiscal year 2008-2009 and an increase in orders of 9% compared
to the previous year. Alstom Transport is present in over 60
countries and employs some 27,000 people.

Press contact
Karen Brouiller

Tel : + 33 1 57 06 18 42 / + 33 6 74 44 59 92

karen.brouiller@transport.alstom.com

Site internetwww.transport.alstom.com