Road agent is a term that is used to describe an individual who engages in acts of robbery or violence that occur on the roads. There are several synonyms for the word, including highwayman, bandit, outlaw, and robber. These words all refer to someone who commits crimes on the road, typically by robbing travelers or carriages. Other synonyms for road agent include marauder, brigand, and pirate, which all suggest a more violent and aggressive criminal. Regardless of the term used, road agents are a dangerous and illegal presence on the roads, and their activities can have a significant impact on the safety and security of travelers.