jiāo​tōng​lì​tǐ​huà

grade separation

  1. traffic
    traffic; transportation; communication; the systems and infrastructure used for moving people and goods or transmitting information
  2. multi-dimensional
    multi-layered or multi-faceted, such as an integrated transport network or a multi-pronged offensive
  3. huà affixparticle
    [...-ize]
    Suffix appearing after nouns or adjectives that expresses a transformation into a certain state or quality, meaning "-ize" or "-ization"