Alternate Reality
(split 2233)
USS Enterprise enters Yorktown

The USS Enterprise enters a Yorktown space lane

Space lanes were a series of tunnels within the "arms" of the Federation starbase Yorktown in the 23rd century of the alternate reality.

In 2263, the USS Stargazer was cleared for Space Lane 4.

During the attack on Yorktown, Krall broke into one of the space lanes with three Swarm ships followed by the USS Franklin under the command of Captain James T. Kirk. While Krall headed into Yorktown itself chased by Spock and McCoy in a hijacked Swarm ship, the Franklin followed through the space lanes. Ultimately, the Franklin emerged from the space lanes into Yorktown Central Plaza to physically stop Krall and his ships. (Star Trek Beyond)