Local Union No. 25 of the International Brotherhood of Teamsters v. New York, New Haven & Hartford Railroad

Respondent railroad has, since 1937, engaged in hauling, between Boston, Massachusetts, and other points in New England, loaded trailers of the type ordinarily hauled over the highways by motor carriers. This operation is popularly known as “piggy-backing.” Trailers to be shipped from Boston are delivered to respondent’s freight yard by employees of the motor carriers. There they are detached from the tractors and driven by special devices onto respondent’s flatcars by employees of New England Transportation Co., a motor carrier, which is a subsidiary of respondent. The trailers are secured…