Sometimes suddenly taking risks can be an example of para-suicidal behaviour and should be taken seriously. For instance, the above mentioned reaction to the truck - IMO it is not a rational response to feel rage when faced with a head on collision, rather fear would have been a more appropriate reaction.

I am by no means saying that you are suicidal or anything like that. You may in fact simply be fed up with constantly being afraid - something I totally understand. However, I would encourage you to discuss these new behaviours with your therapist to help determine whether you are, in fact, fed up or there is another process in play here.