(the worst part of ML is that it is now difficult to search for things about locomotive trains ... fortunately one of the searches reminded me that it was <i>subways</i> and not trains...)<p>A Subway Named Turing - <a href="https://community.fortunecity.ws/underworld/continue/56/subway.html" rel="nofollow">https://community.fortunecity.ws/underworld/continue/56/subw...</a><p>(which is referenced from another HN post that incidentally is from the same site - though different page)<p>Computational Duplo train track layouts - <a href="https://news.ycombinator.com/item?id=17772292" rel="nofollow">https://news.ycombinator.com/item?id=17772292</a> (215 points, 19 comments)
Originally described here:<p><a href="http://www.monochrom.at/turingtrainterminal/Chalcraft.pdf" rel="nofollow">http://www.monochrom.at/turingtrainterminal/Chalcraft.pdf</a><p>From the Cambridge University maths magazine:<p><a href="https://archim.org.uk/eureka/archive/Eureka-53.pdf" rel="nofollow">https://archim.org.uk/eureka/archive/Eureka-53.pdf</a>