GroundBridge

Ground bridges are a technology in the Prime continuity.

A scaled-down iteration of Space bridge technology, a ground Bridge allows transport to coordinates on a single planet. Considerably easier to maintain and less costly in energon to operate, it is the primary means of coordinating Autobot forces on planet Earth. Most tellingly, ground bridge technology requires no receiving terminal at the destination in order to function.

Fiction

Prime cartoon

When Cliffjumper called for backup, Autobot reinforcements converged on his location viaa ground bridge.Darkness Rising, Part 1 When Cliffjumper's life signs were later detected by the computers in the Autobot base, the team likewise departed via ground bridge to investigate. Ratchet was left behind to mind the Autobots' human guests, and explained to them that the team did not have the means to maintain a full space bridge, nor the energon to power such. As a result, they relied heavily on ground bridge technology to dispatch the team to deal with alerts. Darkness Rising, Part 2