Watch Day-to-Day Track Maintenance Part I: Plain Line (1952) : Full Movie Online Free A film giving instruction in the normal maintenance tasks which have to be performed by a permanent-way gang of four men. It shows how all types of fastening on both bullhead and flatbottomed track are maintained; details the maintenance of rail joints; shows how 'hanging' sleepers should be repacked, and deals with the preservation of correct cant and alignment on curves.