Answer:
Step-by-step explanation:
(1) The grammatical name of the expression "ROAD traffic ACCIDENTS" is a noun phrase.
(2) The function of this noun phrase depends on its context within a sentence or a larger text. Generally, noun phrases can function as subjects, objects, complements, or modifiers in a sentence. For example, in the sentence "ROAD traffic ACCIDENTS are a major concern," the noun phrase functions as the subject of the sentence, highlighting the topic of discussion. In other contexts, it could serve as the object of a verb or preposition, provide additional information about a noun, or function in various other grammatical roles within a sentence.