Thales to replace electronic interlockings and track circuits on Madrid–Seville HSR, Spain December 15, 2021 | Europe Company News Thales has secured two contracts to modernise the Madrid–Seville High-Speed (HSR) line. The first contract will cover the replacement of the electronic interlockings on the route with a c... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password