National Express Corporation offers a range of transportation services. The company is a wholly-owned subsidiary of National Express Group, which is one of the leading transportation firms in the United Kingdom. National Express Corporation provides field trip, summer school and charter transportation services. The company offers training routing, and repair and maintenance services. National Express Corporation operates Durham School Services in the United States and Stock Transportation in Canada. The company additionally operates a fleet of more than 15,000 buses and serves over 300 school districts. National Express Corporation provides a variety of customer support, administrative and support services. The company additionally offers transportation services for students with special needs.