Final answer:
One-point perspective is best used to depict a road or train track moving away from the observer into the distance, with parallel lines converging at a single point on the horizon.
Step-by-step explanation:
To show a road or train track moving straight away from the observer and vanishing into the distance, one would use one-point perspective. This type of linear perspective occurs when the receding lines of an object appear to converge at a single point on the horizon. It is particularly effective when the flat front of an object is directly facing the viewer, as it would be with a road or train track.
The parallel lines of the road or tracks would recede into the horizon, creating the illusion of depth and three-dimensional space on a two-dimensional surface.