道

How it works

を (object) marks 道みち (road) as the thing being crossed, and it sits right before the verb. The verb 渡るわたる (cross) takes its volitional form 渡ろうわたろう (let's cross), the casual "let's…" ending that suggests doing something together. No polite です (is) or ます (polite) here, so it sounds relaxed and friendly.