The trolley problem is a thought experiment in moral philosophy, but has begun to have practical consequences as autonomous vehicles become common. Note that the word 'trolley' in the title is used to descibe a small train in some countries. The trrain is imagiend to be out of control and about to hit a group of (say five) people. However, tere is a set of pounts that you can control which will send the train down a sidetrack avoiding the people. Unfortunately there is another person on that track. You have to decide whether to sacrifice this person to save the greater number on the mainline.
Used on pages 555, 557, 567
