
Jennifer H. answered 05/21/20
Senior Administrator Specializing in English including ESL/EFL
Yes, could is correct! Could is use to express things that are possible, a past ability, making suggestions and requests. can is informal and could is formal. In this case you are asking a stranger for directions so you have to be polite/formal. On the other hand, if you were asking a friend or someone known to you it would be an informal request and you would then use the word can.