Hi Carlos,

just to clarify: You say that   remove-short-arcs=0 introduces the sharp angle.
This is not true, as remove-short-arcs=0 will not move anything.  In fact,
the sharp angle is caused by the rounding to Garmin map units.
The green line in the screen shot shows the line that is used after
rounding. You see that the rounding introduces an angle of ca. 75°.
So why does rsa=3 help? Because it flatens the angle as it removes
one point. You can get the same effect if you move one of the node
975733410 a little bit.
The problem disappears when I add a few lines in the code to make to sure
that the calculated bearings are closer to reality (means I overwrite the values).
I thought that the check-roundabout or adjust-turn-headings options were
meant to do that, but they don't seem to help.
I think the reason is that adjust-turn-headings doesn't treat roundabouts
special.
I see two possible solutions when
we detect the situation that the rounding has created an angle which is too sharp
to be reasonable in a roundabout:
1) Overwrite the calculated heading values
2) Try to find the point that was probably rounded wrong, and change its
coordinates. This would have to be done much earlier in the chain.

Both will fix routing , but only 2) will help regarding the ugliness
of the displayed roundabout. I try to code option 2), maybe both are
needed because some roundabouts in OSM are divided into small
fragments.

Gerd