Transwarp Drive

Transwarp Drive was the term used in the 24th century of advanced warp drive propulsion technologies that allowed a starship to reach and sustain extremely high warp factors and travel quickly between distant parts of space.

History
First used in the USS Excelsior as a prototype for the new technology, Transwarp drive was an advanced new form of warp drive that allowed ships to travel faster than traditional warp drives would allow. Because of an inherent flaw in the standard Dilithium matrix used in all Starfleet ships the technology was abandoned before it was fully implemented an only a small number of ships were ever outfitted with it before a newer more efficient standard warp drive was invented.