I know, this film is old but I like people who create own city-state. I also create own state in Cities: Skylines with developed infrastructure and all buldings.
A map is 18km wide so I made a little estimate and your highway should be around 300-500km not 2617km. Maybe because you are Canadian that the scale you are used to is huge compared to a European like me.
So is that map at the beginning a map of a whole map with all those cities and roads in it, or is each city on the map it is its own Cities skylines map.