Akashi Kaikyou Oohashi 明石海峡大橋 is 3,911m long. ( ^ _ ^ )
Kaikyou 海峡 means strait (海 umi, sea and 峡 kai, gorges).
Oohashi 大橋 means "big bridge."
In the photo above, the air is full of kosa, the famous yellow sand invading Japan in spring, till early summer. I read some interesting studies on kosa. It comes from Takla Makan Desert in China, and also Gobi Desert. This sand is carried by the wind to a height of several thousand metres.
It has six lanes.
It took ten years to build this beauty.
Out of its total length, the longest span is almost 2km long, suspended over the sea. And it is designed to resist wind (286 km/hour) and earthquakes (up to 8.5 on the Richter scale). And the sea currents, it goes without saying.