This photo taken on Jan. 21, 2026 shows two bullet trains passing each other near Atocha Station in Madrid, Spain. Adif, Spain's state-owned railway infrastructure manager, announced on Tuesday that it has imposed temporary speed limits on certain sections of the high-speed railway from Madrid to Barcelona, after train drivers reported bumps along the rail link. (Photo by Gustavo Valiente/Xinhua)

This photo taken on Jan. 21, 2026 shows high-speed trains at Atocha Station in Madrid, Spain. Adif, Spain's state-owned railway infrastructure manager, announced on Tuesday that it has imposed temporary speed limits on certain sections of the high-speed railway from Madrid to Barcelona, after train drivers reported bumps along the rail link. (Photo by Gustavo Valiente/Xinhua)

This photo taken on Jan. 21, 2026 shows high-speed trains at Atocha Station in Madrid, Spain. Adif, Spain's state-owned railway infrastructure manager, announced on Tuesday that it has imposed temporary speed limits on certain sections of the high-speed railway from Madrid to Barcelona, after train drivers reported bumps along the rail link. (Photo by Gustavo Valiente/Xinhua)

A bullet train is pictured at Atocha Station in Madrid, Spain, Jan. 21, 2026. Adif, Spain's state-owned railway infrastructure manager, announced on Tuesday that it has imposed temporary speed limits on certain sections of the high-speed railway from Madrid to Barcelona, after train drivers reported bumps along the rail link. (Photo by Gustavo Valiente/Xinhua)