Official window
2021–2032
Target year: 2032
Project status
Second Gotthard tunnel: how far along is it?
This page summarises the second Gotthard tunnel project with calendar-based progress, remaining time, and the kind of technical numbers that tunnel geeks love.
Calendar progress
47.7%
Calendar progress across the official build window
Days left
2,295
Days until the end of the 2032 build window
Days since TBM start
584
TBMs started the main drive in February 2025
Why the second Gotthard tunnel is being built
The existing 1980 road tunnel needs comprehensive refurbishment. The new bore keeps this vital north–south road link available during that work.
Once both bores are ready, each will carry one direction of travel, with one running lane and one emergency lane.
Project aims
Keep the route available
Maintain a dependable route between central Switzerland and Ticino during refurbishment.
Improve tunnel safety
Separate directions of travel and support faster evacuation and emergency response.
No capacity increase
There will still be one running lane in each direction.
Protect the long term
Make future maintenance more manageable without severing the link.
Useful nerd stats
16.9 km
official tunnel length
12.3 m
diameter
7.4 million t
rock to remove
68
cross passages approx.
126.6m CHF/km
project cost per km
423
days per half-bore at 20 m/day
Official construction facts: the 16.9 km bore advances at about 20 m per day per TBM on average, with around 680,000 m³ of concrete and 160,000 m² of green-area mitigation.
After the second bore opens in 2032, the first bore will be refurbished. The combined construction and refurbishment programme is scheduled through 2033.
Quick notes
- TBMs are driving from both portals toward the centre.
- The second bore has been under construction since 2021 and is scheduled to open in 2032.
- The first bore will then be refurbished while the connection remains available.
FAQ
When will the second Gotthard tunnel open?
According to the current federal project overview, the second bore is scheduled to open in 2032. No precise opening date has been published.
Is the progress number physical progress?
No. The percentage is the calendar progress across the official 2021–2032 build window.
How fast are the TBMs moving?
The official project page cites an average of about 20 metres per day per machine.