<span>The foreshadowing is when Montresor and Fortunato discuss Montresor's family</span>
It means they are doing road work on one side of the road. The arrow is to show you which direction. The mistake is that they are driving on the construction side.
As the author tries to give you this certain relief but throughs in the last part “for a little while” to add suspense that this wont last long. The author adds it to add thought and suspicion on to what to come later as a foreshadowing of the future from the present.
