I've had several premonitions that came true as well and I definitely think they could have been avoided. My three biggest ones:

My first one was a car accident too. My husband pulled into a parking spot close to an intersection and I saw a car running a light and smashing into us. I begged him not to park there but he said I was being silly and e was just going to run into this store for 2 minutes. I waited in the car with this feeling of dread and sure enough a few minutes later I heard squealing tires and a car slammed into me. if DH had listened to me my car would have not been in the accident (which ruined 4 other cars besides mine)

My second was a premonition about my friend's dog killing one of my guinea pigs. Her dog was locked in a kennel in the bedroom and my Guinea Pig was in a cage in the living room, but i still saw it happen in my head. My friend reassured me they would both be fine and we went to a fitness class. We returned home and her dog had broken it's crate and my premonition had come true. It could have been prevented had I taken the pig with me instead of leaving it at her house.

My third premonition was about my ****atiel flying out an open window while I was cleaning. I had the windows open for cleaning one day so I put my ****atiel in his cage where he would be safe. Sadly the cage didn't lock properly and he got out, and something spooked him and he was gone out the window. If I had listened to my warning I would have closed the windows and he would still be with me.

I've had lots more premonitions since then but now I make sure I listen to them (and so does my husband) and luckily none of them ever end up happening anymore (but I know they would if I ignored them).