An object or substance thrown, deposited or left on the pavement or roadway that obstructs or endangers other road users, and which must be removed as soon as possible or, if that cannot be done immediately, warned about.
在行人路或馬路上拋擲、棄置或遺下而妨礙或危及其他道路使用者的東西，須盡快清除，如無法立即清除則應發出警告。