Strange request. We would like to visit Mt. Titles. We want to take the Zentralbahn railway direct from Lucerne to Engelberg. The issue is my wife is claustrophobic and has issues with tunnels. If she is aware of the tunnel before we go through it and approximately how long (distance and time) it takes to travel, it greatly helps. Has anyone any first hand experience with this route? Is there any other option? On another day we will be going to Mt. Rigi by boat. No problem there. Thank you in advance.
Zero tunnels on that route.
I think you already asked about this. There is a tunnel.
https://community.ricksteves.com/travel-forum/switzerland/lucerne-titlis
Zero tunnels on that route.
There are four tunnels on the route. The longest is the last one, close to the end.
The first three are shorter, and you could avoid them by taking the boat to Stanstad (in itself a nice ride). The last tunnel is unfortunately unavoidable.
in your previous question in December I provided not only how long each was but a youtube of the trip. Look at your previous question, linked above.