Alternate reality
Corridor 67 was a trade line connecting two white pentagons on a galactic map.
This map was seen on a powerwall in the offices of Admirals Christopher Pike and Alexander Marcus at Starfleet Headquarters in 2259 of the alternate reality. (Star Trek Into Darkness)
The meaning of the pentagons is not defined on the map.
As the result of the two-dimensional nature of the map, it is not possible to know the trade line's location in relation to the Klingon Empire. The map is visible in the video "Star Trek: Into Darkness – User Interface VFX" at vimeo.com. [1]