The WBCSD's Urban Infrastructure Initiative (UII) brings together a diverse group of companies: ACCIONA, AECOM, AGC, CEMEX, EDF, GDF SUEZ, Honda, Nissan, Philips, Siemens, TNT, Toyota and UTC. The UII Co-chairs are CEMEX, GDF SUEZ, Schneider Electric and Siemens; WBCSD is also actively involved as Co-chair. These companies from sectors including energy, buildings, materials, transport, engineering, water, equipment, and support services are collaborating to help urban authorities develop realistic, practical and cost-effective sustainability action plans. The project draws on the expertise of individual companies who already work with urban planners and engineers to provide services and solutions to sustainability challenges in cities.