نقل بالسكك الحديدية: الفرق بين النسختين

|accessdate=2008-08-10}}</ref><ref>[http://www.railwatch.org.uk/backtrack/rw94/rw094p06.pdf this source], railways are the safest on both a per-mile and per-hour basis, whereas [[Aviation|air transportطيران]] is safe only on a per-mile basis</ref><ref>{{cite web |url=https://www.voev.ch/de/Service/Downloadsindex.php?section=downloads&download=2208 |title= Facts and arguments in favour of Swiss public transport |page=24 |format=PDF |accessdate=3 July 2016 |quote=6.3 billion Swiss francs}}</ref>