Someone has a dream about a train traveling through a tunnel, which represents his hidden desire to engage in sexual intercourse. According to Freud's view of dreaming, what would be the latent content of this dream

According to Freud's view of dreaming,  the latent content of this dream is connected to sexual intercourse.

Explanation:

According to Freud's view of dreaming, Freud pointed out a constant connection between some part of every dream and the dreamer's life with a solid conclusion that every dream attempted to gratified some sort of wishes, this approach disregards the popular believe that dreams are just nonsensical coming from nowhere and leading nowhere 

In his interpretation of dreams, Freuds explains the differences between what he termed surface or manifest content of dreams and its latent or hidden content, he believes that the true meaning of dreams lies in its hidden content. He analysis the example of the dream given in the question: the train is a symbol for a pe n  is, the tunnel is a symbol to represent a vagi na while riding the train through the tunnel represents the dreamer's desire for sex-ual intercourse.

Therefore, the latent content of this dream is connected to se x-ual intercourse