Interlocking and Train Protection is the third Part of Mcfarlane's series on Railway Safety. It addresses traditional mechanical and Double Wire interlocking of points and signals, electrical interlocking, and techniques with no interlocking at all. There's a special focus on crossing loops, and some landmark accidents both overseas and here in Australia are described to bring out the key points.The book discusses the principles of simple in-cab train protection systems like Driver Reminder, Deadman, and Vigilance, including an exciting new vigilance system, then addresses Automatic Warning and full Automatic Train Protection, from 1851 to 2004 with the key features of commonly-used. The final chapters address the last three major electric train accidents in Melbourne and Sydney in the traditional hard-hitting manner for which Macfarlane is known.