Like others, I think some fear is healthy. If it prevents you from doing what you love, keep facing the fear with the new tires until you feel you have mastered the situation. I try to distract myself. I have had a couple of accidents in the last year. After the first one, I was sooo paranoid about trucks. I would sing, curse, and give the princess wave whenever necessary to deal with the fear when it rose its ugly head. I know when I can ride again, facing fear of every ped xing could be a challenge. As a former therapist and ugly accident survivor, all I know is to face what I fear with knowledge until I fear it no more. Good luck to you. Take care. Don't give in.