HighwaysIn X-R, highway's are a new addition to the x-universe. We first started to see them form in Albion Prelude (X3AP) during the plot. Think of Highways like large pipes in your house - that carry water to set places. The same happens in X-R but rather than water, the highways carry ship at extremely high-speeds. There are two types of highway's; Super highways, and Local highways. Super highways are always blue, whilst Local highways are green.
Super highwaysSuper highways are the larger highways that connect sectors together. Because they connect you across large distances, you can not exit them at will. Super highways are directional, so if you try to enter an exit gate, you will be pushed away. Super highways are normally blue.
Below is a picture of a super-highway gate:
Local highwaysLocal highways are a little different to the Super highways; firstly they are coloured in green (which is obvious I know but still). However that's not the only difference - Local highways are positioned in a way to take you around a sector, often stopping at certain zones. Unlike Super highways you can leave a Local highway at any-time by breaking or heading out of the highway, this maybe required to visit certain zones on the way (some local highways go in a continuous loop from their start zone). You can rejoin the highway at anytime by simply flying into it (you do not need join the highway at set positions).
Highways also have lanes, that you can switch for over-taking and/or combat reasons.
To over-take, you must use your booster. However this will drain your energy much faster than in normal-space.
Like Super highways, Local highways are also directional - meaning you must follow the flow.