I want a 3D accurate model of a road to use in a video game called assetto corsa.

I would like a road that i drive on in my country to be 3D modelled and turned into an accurate representation of that track to use in the video game assetto corsa. I want it to be modelled with the correct scenery, height differences etc or as close to that as possible. It is a 50km stretch of road so this may take some time to model i understand. I am not sure if google maps or google earth can be used to help this process but thats for you to decide i guess. I have attached a picture of the route and also provided a link below for the google maps route that you will need to help you model this.

Cotter run google map route:
https://goo.gl/maps/EzUwKNh2abfTJSgR7