https://youtu.be/OlmPlTIvU8U

heres a vid of it, theres a lot of legitimate uses of it in this video. like there are some bits where it would be flatly impossible / extremely absurdly expensive to put a train/tram underground or overground for passengers. the best ones imo are where they take advantage of cliffsides and rock faces for the poles that would be otherwise useless for transportation like with the silver line