Stray current corrosion management is best commenced from the outset of a project. There is nothing as disappointing, or as costly, as attempting to rectify stray current problems at the end of a construction package that were built into a system a year or two before. Companies responsible for installing DC rail systems, such as a light rail extension, should recognise the importance of effectively addressing this aspect and that it is invariably the sort of pass/fail criteria that clients stringently specify.