Bridge-based

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High speed fly-over/under junction.

• Trains can travel at high speed.
• Can handle a huge amount of traffic.
• Can be used on a mainline.
• Area: 16 x 16

Tunnel-based

Compact

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High speed fly-over/under junction tunnels compact.

Symmetric

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High speed fly-over/under junction tunnels symmetric.

• Require the tunnel cross cheat.

Using 2-Layer tunnels

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High speed fly-over/under junction 2-layer tunnels symmetric.

• Using this method you don't need the tunnel cross cheat anymore, but the deep tunnels are longer and the signal gap increases by 2 on that line

A variation on this theme

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High speed fly-over/under junction variant.

• Each path has no more than one downward and upward slope
• The tightest turns are 1.5 tiles wide
• Area: 15x15

===A huge variation of the theme (only tunnels, no cheats)

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Huge, high capacity, high speed fly-over/under junction.

Pros

• Hills: Yes
• Sharpest turn: 6.5 tiles wide
• Capacity: 50 6-tile trains

Cons

• Area: 52x52
• Cost: Expensive