Mass transit in space. A light sail craft that uses lasers projected from a series of stations set around a solar system in a large oval track that can be hundreds of AU long. When the craft comes near its destination it jettisons its cargo and passenger pods and another series of laser projectors turn the sail onto an arc bringing them around on a path back in to the system, never stopping entirely. New pods are dispatched to rendezvous with the sail craft in motion. The craft decelerates slightly when turning, but can near a percentage of the speed of light, taking the passengers anywhere within most star systems in a manner of weeks to months.
The majority of beamferries run from a system’s inhabitable planet to a stargate, throwing pods on a ballistic arc through the gate to meet up with the destination system’s beamferry.