Lieråsen Tunnel

Infobox tunnel
name = Lieråsen Tunnel

---

caption = The tunnel entrance seen from Lier
line = Drammenbanen
location = Asker and Lier
system = Norwegian Railways
start = Asker
end = Lier
stations =
status =
open = 1973
close =
owner = Jernbaneverket
operator = Norges Statsbaner
CargoNet
character =
linelength = 10,723 m
tracklength =
notrack = 2
gauge = RailGauge|sg
el = 15 kV AC
speed = 160 km/h
hielevation =
lowelevation= |

Lieråsen Tunnel is a railway tunnel on Drammenbanen between Asker Station and Lier Station in Norway. The 10,723 m long tunnel was opened in 1973 and was the longest railway tunnel in the country until Romeriksporten was opened in 1999.

After the tunnel was opened, the railway line between Asker and Spikkestad Station was kept for commuter trains, though the traffic between Spikkestad and Drammen Station was terminated.