Actually, I like the gauge & I'd like to add it to modRana.

There is are already dedicated info display pages in modRana,
so it could be put there as a dedicated speed-gauge page.

As for displaying it on the map, there is already the compass widget
in the upper left corner, scale bar in upper right and the bottom corners
are occupied by buttons.

But I guess I could add a setting to configure what should be shown in the upper
corners - compass/scale bar or the speed gauge. Should not be that hard.

And sorry for thread hijacking & we can certainly move further discussion
about this to the modRana thread.