I got the image from a site showing photos from Paraguay. The designers of that bus were probably playing a prank, thinking that someone would come up with the idea of parking it on the tracks, in order to scare a locomotive conductor excrementless, since he wouldn't know, first hand, that it's only a bus of which his locomoitive can take, without the conductor even suffering a scratch
(1949)* – View looking southeast down Cahuenga Boulevard, from just west of where it crosses Lankershim Boulevard (center). Seen, from left to right are the Lankershim Bridge and Tunnel (only partially visible), a Foster and Kleiser billboard advertising the 1949 Ford automobile (left), homes up in the hills, a Rexall drugstore and a Standard oil service station. Photograph dated June 23, 1949. Historical Notes The bridge/tunnel was built in 1948 as part of the Cahuenga Freeway; it is now known as the Lankershim/101 Freeway Bridge and Tunnel. The corner where the billboard is seen (left of center) was named Yitzhak Rabin Square in 1995 in honor of the slain Israeli Prime Minister.*