ITALIAN State Railways (FS) will participate in the construction of the Teheran - Hamedan and Qom - Arak high-speed lines under a framework agreement with an estimated value of around €3bn, which was signed in Tehran on April 12 by FS CEO Mr Renato Mazzoncini and Dr Mohsen Pour Seyed Aghaei, Iran's deputy transport minister and president of Iranian Islamic Republic Railways (RAI).