Work songs were used by African American railroad work crews in the southern United States before modern machinery became available in the 1960s. Anne Kimzey of the Alabama Center For Traditional Culture writes: "All-black gandy dancer crews used songs and chants as tools to help accomplish specific tasks and to send coded messages to each other so as not to be understood by the foreman and others. The lead singer, or caller, would chant to his crew, for example, to realign a rail to a certain position.