How to Build a Double-Decked Expressway in Cities Skylines

How to Build a Double-Decked Expressway in Cities Skylines

The Shuto Expressway in Tokyo is famous for stacked highway sections. Episode 10 recreates this with a double-decked E52 expressway — one of the most technically demanding builds in the series.

Road Placement

Two road segments aligned vertically. Lower level at 8-12 meters above ground, upper level 6-7 meters higher. Node-by-node alignment is critical — any horizontal drift makes the stacking look sloppy.

Road Marking

Using IMT, Japanese expressway markings on both levels: edge lines, lane dividers, chevron areas, text markings. Each level gets its own complete set.

Pillar Placing

Single-height pillars for the elevated section, double-height for the stacked section. Spaced every 25-30 meters with pillar caps, cross-beams, and anti-seismic dampers — a distinctly Japanese engineering detail.

Lane Indication Signs

Overhead gantry signs with kanji destination names and romanized text, constructed using gantry frame props and Procedural Objects following Japanese expressway conventions.

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