Plate Crossings are a type of railway crossing that is used to connect two railway lines that are at different levels. The term 'PLATE' refers to the metal plates that are used to bridge the gap between the two lines. The term 'crossings' refers to the fact that the two lines cross each other. The solution for the term 'PLATE Crossings' is 'RUNS', which refers to the fact that trains run over the PLATE crossings.