knobbhill. the cable car picks people up. takes them to work. >> there still is no other device to conquer these hills better than a cable car. nobody wanted to live up here because you had to climb up here. with the invention of the cable car, these hills became accessible. he watched horses be dragged to death. cable cars were invent in san francisco to solve the problem with it's unique, vertically challenged terrain. we are still using cars a century old >> the old cable car is the most unique thing, it's still going. it was a good design by then and is still now. if we don't do something now. it's going to be worse later. >> the cable cars are built the same as they were in the late 1800's. we use a modern machinery. we haven't changed a thing. it's just how we get there. >> it's a time consuming job. we go for the quality rather than the production. we take pride in our work and it shows in the end product. >> the california line is mostly locals. the commuters in the morning, i see a lot of the same people. we don't have as tourists. we are coming up to street to chinatown.