MRA and tunnels

[Adrian Avram]

Hi !
In just 29 days I leave from Romania to the Swiss Alps and I am wondering how does MRA behave in tunnels (and I have to pass a lot in Austria) ?
I want to use the track record function as well, and I was wondering if it works well trough long tunnels, where there is no GPS signal ?
Thanks !

[Nick Carthew]

@Adrian-Avram I would for obvious reasons avoid positioning route points inside a tunnel and I would also avoid positioning them too close to the exit of a tunnel, the app will need to wake up and get a fix on the satellites again. As the tracking works from the GPS signal, I suspect that you'll see straight lines for the tunnels.

[Herman Veldhuizen]

mra recovers after leaving the tunnel, but inside the tunnel it behaves chaotic. it sometimes thinks that you are driving backwards, recalculates accordingly , severely effecting the ETA info.
I have a video showing it if you are interested.
Tomtom behaves better, i guess it assumes that you drive at constant speed and moves the cursor accordingly.

[Adrian Avram]

@Herman-Veldhuizen yes, can you put a link to the video here ?
Thanks !

[Herman Veldhuizen]

@Adrian-Avram
https://drive.google.com/file/d/16xe9XEVUoiZR06ej2_fCkQGDLABxxj3Y/view?usp=drivesdk

The tunnel starts 1min and 25sec into the video.

Route:
https://www.myrouteapp.com/route/open/10876313

[Makro]

@Herman-Veldhuizen said in MRA and tunnels:

mra recovers after leaving the tunnel, but inside the tunnel it behaves chaotic.

I experienced the same in a Stockholm tunnel recently. It was a bad experience, because I had to take an in-tunnel exit, and since the map didn't keep updating my assumed position, it was hard to know which exit to take.

So Adrian, you need to look carefully at the map prior to entering a tunnel, so you know if you have to take an in-tunnel exit.

[Adrian Avram]

@Makro thats what I am afraid of. Thank you for the advice !

[Guzt]

Swiss Alps? Don't forget to disable roaming on your telephone. When not, you're in for a surprise when you will receive your telephone bill.

[Rob Verhoeff]

@Guzt said in MRA and tunnels:

Don't forget to disable roaming on your telephone.

That entirely depends on what kind of data cap you have with your provider! I don't worry at all

[Adrian Avram]

@Guzt I had forgotten completely about this aspect ... Thank you for reminding me !!

[Nomko Nomden]

Does offline navigation not solve this issue? Or are you even with offline navigation depending on a good/solid/working GPS connection?

[Guzt]

Using off line navigation or not, always switch off roaming in Switserland. They have their own telecom rules and are not part of the EU which implicates that the EU roaming agreements don't apply for them. As soon as your telephone makes contact to a Swiss telephone service, costs kick in. To avoid this, use a Swiss eSIM .
https://saily.com/download-esim-app/

[Tony 13]

For the roaming you just need to check your contract. O2 does include Switzerland in roaming from the UK
https://www.o2.co.uk/help/international-and-network/using-your-phone-abroad/roaming-in-europe-pay-monthly

[Peter Zehentreiter]

@Guzt However, this is only partially true. For example, Deutsche Telekom's tariffs include roaming in Switzerland and the UK.
I can't comment on other providers.

[Rob Verhoeff]

@Guzt I mentioned this before... That's not entirely true! There are Dutch providers that simply consider Switzerland an EU country. For example, with my Dutch mobile plan, I'm allowed to use 50GB per month from my Dutch data bundle in an EU country (including Switzerland). So you really need to check the terms and conditions of your provider in your own country!

[Guzt]

My provider blocks Switzerland just to avoid the possible surprise. I have to activate it or buy a data plan for it. But then, Belgian telecom is so what the most expensive in the EU.
So it is up to Adrian to check this with his telecom provider.

[Rob Verhoeff]

@Guzt said in MRA and tunnels:

Belgian telecom is so what the most expensive in the EU.

Time to shop elsewhere

[Guzzist]

@Nomko-Nomden offline navigation depends also on good GPS receive. Means: you don't need roaming/eSIM for Internet connection. But in long tunnels, you will loose GPS - and if there is an exit inside the tunnel, you need to take- MyRoute-App may will not navigate you!

[Herman Veldhuizen]

i drove through many tunnels in Norway today, including the 25km long Laerdals tunnel. MRA worked without a glitch inside these tunnels, no spinning, no jumping to roads above the tunnel. This is with the 5.0.3 version. I even had a shaping point inside one of the tunnels and that worked as well.

[Guzzist]

@Herman-Veldhuizen ...then you are lucky.
The reasons are:

• Navigation systems can also interpolate their own position from direction and speed. But that only works in straight tunnels.
• In some tunnels are so called beacons installed, by this navigation systems can also calculate the actual position (in GoogleMaps, this option must be activated in settings).
• In other tunnels there may be TunnelSat installed. This is an advanced tunnel GPS system that extends reliable satellite navigation underground, delivering accurate, real-time positioning signal.

It depends on the tunnel operator.