Sorry for the delay in responding, não sei se inclusive você já realizou a viagem.

Then, in fact there is a large stretch of mountains with many curves. But did the day, very sunny and despite a bit of seasickness (to anyone who was in the backseat), and really rocking, did not seem dangerous. But there may also be associated with the issue of feeling safe in driving on roads with hills. How are SP're used to it…
As for other hazards (assaults, many trucks) não podemos informar pois não vimos ou ouvimos falar disso quando percorremos.

Hugs!