Geometry and layout standards for the mainline.

 Geometry

• Spacing: Tracks must have 3 blocks space between outer edges for normal speed layouts; 2 blocks is acceptable for medium speed areas.
• S-Bends: 2 chunks for medium speed, or 3 chunks for normal speed tracks.
• 90° Curves: Should be over an area of 48x48 blocks for medium speed and 64x64 blocks for normal speed.
• 45° Curves: Half the recommendation of 90° curves.

📐 Grade & Direction

• Slopes: Must not be steeper than 2 block raise over 16 blocks distance.
• Switches: Aim for 16 blocks between a switch and a curve (not strictly required).
• Driving Side: Tracks and signals must be designed for right-hand drive.