ČSD Class E 499.3 electric locomotives were used primarily for passenger trains in Czechoslovakia. Locomotives which passed to České dráhy, rail operator in the Czech Republic are now classified as Class 163, those which passed to ZSSK, rail operator in Slovakia, are also Class 163.

RegioJet a.s. is a private Czech provider of passenger rail and bus transport. The company Student Agency, owned by Czech businessman Radim Jančura, is the sole owner. A sister company of the same name, with its registered office in Bratislava, is an operator of passenger rail and bus transport in Slovakia.