Question: when did scheduled common carrier freight and passenger service begin in the u.s. ​
Answer: May 1830

title: History of rail transport in the United States
text: started passenger train service in May 1830, initially using horses to pull train cars. The South Carolina Canal and Rail Road Company was the first to use steam locomotives regularly beginning with the Best Friend of Charleston, the first American-built locomotive intended for revenue service, in December 1830. The B&O started developing steam locomotives in 1829 with Peter Cooper's "Tom Thumb". This was the first American-built locomotive to run in the U.S., although it was intended as a demonstration of the potential of steam traction rather than as a revenue-earning locomotive. Many of the earliest locomotives for American railroads were