Siemens to supply turnkey system for Riyadh metro October 14, 2013 | North America Company News German-based Siemens has secured a contract worth EUR1.5 billion from Arriyadh Development Authority to supply the turnkey system with rolling stock, signalling and electrification of Lines 1 and 2 of... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password