Why are there funeral homes along the high way?

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I am still wondering why are there funeral homes along the highway. While I was on a break, and 50% of the long break was spent on riding the bus, I noticed that most funeral homes are found in the highway, then I remembered that a friend in HS told me once that the very reason why funeral homes can be found along these areas is because accidents do happen along the highways, and it is income generating for the funeral business. Do you know of other reasons why funeral homes exist along these areas?