That can be misleading if these are the late 19th / early 20th century railroad tracks which got dismantled in most of the west (due to road competition) especially as it's unlikely they got upgraded. For instance the french railway system has contracted by half since its height in 1914, Belgium's didn't contract quite that much but not far (according to wikipedia there were 5300km of tracks in 1912, today there are 3600).
Many of the smaller single-track ways linking small villages got progressively abandoned during the 50s and 60s, as local train lines were replaced by buses, cars and trucks (for freight).
That can be misleading if these are the late 19th / early 20th century railroad tracks which got dismantled in most of the west (due to road competition) especially as it's unlikely they got upgraded. For instance the french railway system has contracted by half since its height in 1914, Belgium's didn't contract quite that much but not far (according to wikipedia there were 5300km of tracks in 1912, today there are 3600).
Many of the smaller single-track ways linking small villages got progressively abandoned during the 50s and 60s, as local train lines were replaced by buses, cars and trucks (for freight).