Complex sentence: Arena was formerly the terminus of both the Sandy/Salt Lake and the old University Line, however, an expansion opened on 16 April 2008 which provided access to the Salt Lake City Intermodal Hub and the new FrontRunner commuter rail system.
Split into simpler sentences: Arena was formerly the terminus of both the Sandy/Salt Lake and the old University Line. However, an extension opened on 16 April 2008 which provided access to the Salt Lake City Intermodal Hub and the new FrontRunner commuter rail system.