Topical phrases are the words that are used to define the location and the places. The correct directional phrase is could you tell me.
Directional phrases are the words and phrases that describe the direction that is either asked for or given to another person. Some of the directional words: went, go, tell, send, answer, show, etc.
In the sentence, the person is asking for the direction so before asking the words excuse me, hello, etc are used and then followed by the could you tell me.
Therefore, the correct phrase is could you tell me.
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