In your opinion, is the white vehicle within the curve positioned correctly?

No, the vehicle is close to the middle of the roadway and it endangers vehicles coming from the opposite direction.

In sharp curves it is necessary to “cut” through the curve, in order to reduce the centrifugal force (the force that acts on the vehicle while it turns).

When there is no other vehicle in the curve it is possible to be positioned anywhere within it.

When driving on a sharp curve, it is required to stay in it as shortly as possible; hence his position is correct.