" without slowing anyone down. " - but the very first image you provided will slow down pedestrians, it's harder to cross compared to a simple direct crosswalk

" without slowing anyone down. " - but the very first image you provided will slow down pedestrians, it's harder to cross compared to a simple direct crosswalk and it's less friendly to ppl with mobility problems. Such bridges are relatively ok to implement outside cities where you have highways/roads with cars driving high speeds but these are bad solutions inside cities where the priority belongs to pedestrians and cars must drive slower