Railway

Track is a buildable structure which trains run on. Train stations can be placed by the track. Track can be laid on the ground. It cannot loop upside-down.

Switches are made by joining two rail segments and then adding a third segment to that junction. A flag will be placed on the switch, but currently it's wonky, and its setting is ignored by automated trains.

Minimum and maximum build length
The minimum length for a single segment is 12 meters. The maximum is 100meters. You can connect multiple segments end to end to build a longer track.

Cost
The cost of the track is 1 Steel Pipe + 1 Steel Beam at the first 6 meters, and 1 Steel Pipe + 1 Steel Beam for every 12 subsequent meters. Due to the build length constrains, it is capped between 2 Steel Pipes + 2 Steel Beams to 9 Steel Pipes + 9 Steel Beams.

Turning radius
The minimum radius could not be determined at the moment, but it is measured to be at most 21 meters.

Maximum slope
If the starting and ending points lie on the horizontal surface such as foundations, the maximum slope is 28 meters high over the distance of 94.5 meters, which is 3.375. If both starting and ending points lie on the 8 x 2 ramp, then the maximum slope can be increased to 1:2.7. You could not build a track on a 8 x 4 ramp.

Build order
One should build the Train Station before laying the track, else the station will be build on top of it but will not connect to it.

Collision width
The is no collision box implemented at the moment, which means that the track (and entire trains) can clip trough the ground. Judging from the visual it is about 6 meters wide and 1 meter high.

Snapping
Track do not snap on foundations, but do snap to train stations and to each other.

Deconstruction
You can deconstruct the track at any time. You cannot deconstruct the track in a train station, you have to deconstruct the train station instead.

Supporting columns
There is no supporting columns for the track, as opposed to what is displayed in the E3 trailer. The latitude curvature of a track is only dependent on the slope of the stating and ending points, that means if the starting and ending points lie on a flat surface such as foundations, the track will be perfectly horizontal, despite a large gap in between. On the other hand, Attempting to build on uneven ground could lead to unexpected sloping of tracks.

Derailing
A train cannot derail. Instead, it will suddenly stop at the end of the track.

Power
Train track can conduct power, to feed it to Electric Locomotives, or between any station.