Line Extensions

Line Extensions are branches of ordinary USX Lines, that are only available on weekends, and cost more than ordinary lines. They are sometimes labeled as "EXT".

About
Extensions offer further connectivity to other lines or major cities, and can be extremely useful in travel. The fee is usually an extra $15 per passenger who uses an extended line, EACH WAY. On the map, they are represented by dashed lines, and extension lines have a diamond bullet as opposed to a regular circle. There are five extensions that exist in the USX system.

Blue Line Extension
The Blue Line has one extension, which runs to Montréal, Canada. This extension is only available from Toronto.

Green Line Extensions
The Green Line is unique because it is has two extensions. The first runs to Chicago, accessible from St Louis (connects with the Blue and Midwest Lines). The second runs to Las Vegas, accessible from Salt Lake City (connects with the Purple and Red Lines).

Yellow Line Extension
The Yellow Line has one extension, which runs to Nashville from Charlotte, and connects with the Midwest Line.

Purple Line Extension
The Purple Line has one extension, which runs to Denver from Oklahoma City (connects with the Green Line).

Red and Orange Lines
The Red and Orange Lines do not have extensions, but they have transfers, as do all lines.