横断 (ōdan) means “crossing” | MotiTan Japanese Dictionary

More examples

地下道を使って横断しました。chi ka dō o tsuka tte ō dan shi ma shi ta

I used the underpass to cross.

Indicates passage across the breadth of something, ending on the opposite side rather than remaining within the same area.

渡りwatari: A movement from one side of a place to the other, often by crossing a boundary or space.

ある場所や線の一方の側から反対側へ通り抜けること。a ru ba sho ya sen no ip pō no gawa ka ra han tai gawa e tō ri nu ke ru ko to

横 (ō, "sideways") + 断 (dan, "cut") gives 横断 (ōdan), a compound based on the idea of cutting across a space.

横断 (ōdan) can describe travel across a whole region, as in 大陸横断 (tairiku ōdan), so its use extends beyond crossing a road.