|} The
Zürich–Olten line is a major railway line in
Switzerland connecting the cities of
Zürich and
Olten. The original line generally followed the south bank of the
Limmat from Zürich to near its confluence with the
Aar near
Brugg and then it generally followed the south bank of the Aar to Olten. The central section between
Killwangen-Spreitenbach and
Rupperswil now follows a more southerly route through the Heitersberg Tunnel. The line is electrified at 15 kV 16.7 Hz and much of it has four tracks.