In Gibbons v. Ogden in 1824, the Supreme Court ruled that under the Commerce Clause of Article 1, Section 8 of the Constitution, Congress had the power to regulate commerce crossing state lines. According to PBS, this ruling included transportation and guarded against conflicting state legislation.
Furthermore, post Gibbons, the Commerce Clause of the Constitution enabled much sweeping congressional power over a number of different national issues. Gibbons v. Ogden came about due to steamship franchises making conflicting claims. The state of New York had licensed Aaron Ogden to operate a certain route between New Jersey and New York along the Hudson River. Thomas Gibbons used the same route with two ferries. Ogden pursued his case in a New York state court against Gibbons, and Gibbons retaliated by claiming his rights under the 1793 act of Congress regarding coastal commerce. Both the New York state court and New York Supreme Court ruled in favor of Ogden, leading Gibbons to appeal the case with the U.S. Supreme Court in 1824.