With the sidenote that the issue of the spacing of cross-passages (for bi-tube tunnels) resp. escape hatches (for two-track single-tube tunnels) is a nasty little secret of new long tunnels, with DB under Grube's predecessors as one of the worst offenders. Saving cros-passages is saving costs, after all... Now EU rules force a spacing around every 300-350 m, which still means that passengers would have to walk hundreds of metres in an orderly fashion along the side of the stopped 2x200 m long train to the cross-passage while smoke fills the tunnel, but better than 500 m (the in-construction bitube Katzenbergtunnel), or even up to 1000 m distances (Cologne-Frankfurt line monotube tunnels).

Of the longest new tunnels, Spain's 28.4 km Guadarrama Tunnel is the best in this respect (cross-passages every 250 m).

_{*Lunatic*, n.
One whose delusions are out of fashion.}