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.