Complex sentence: Built during the nineteenth and early twentieth century of the British colonial rule, "the Raj", these lines have been running since, and today the Indian Railways runs them, along with the Kashmir Railway, operational since 2005.
Split into simpler sentences: Built during the nineteenth and early twentieth century of the British colonial rule, "the Raj", these lines have been running since that time. Today the Indian Railways runs them, along with the Kashmir Railway, operational since 2005.