@Captain24 i too will be posting in multi-part replies because i cant hold all the things i want to respond to in my memory at once. 😉 (if im on my laptop, i use multiple tabs. But on my phone it causes the page to reload and risk loosing my "text so far"!)
I think you anger at the work situation/response it quite justified and a reasonable emotion to feel. Their lack of addressing the safety issue with the other driver is very understandable and reasonable to trigger a "threat" response in your system. You deserve to be safe at work; they are obligated to address safety (legally and ethically). Does you worksite have an incident register you could record it in as an "avoidable near miss"?
Would you feel better to talk to management about the incident later when you feel clamer? (Possibly even with a support person to help you stay grounded if needed?)
I'm wondering what can help you feel heard and safe again at work, without fear of similiar incidents happening again (or being dismissed when raising safety concerns).
The tailgating driver would also activate a feeling of "threat" and fear quite understandably. I think your response to it was really really practical - devise a plan for if they had turned off out of turn behund you : to head back into town to a safe place. 😊 i am proud that your rational protective brain kicked in with such a good solution!!
I am also relieved that you did not need to put it into action, as they did not follow you out of town. *phew*!
Its OK to feel anger. Sometimes we are taught to "not be angry", but i reckon anger is a really important emotion. But just as important is *how we respond* to our anger. I cant recall which PSW here has also mentioned it, but I know one of them did because i remember thinking "yes! Exactly!" --- often underneath anger is another feeling. In this case i would guess "threat for safety" and in terms of being dismissed at work also "injustice". Hurt can be really vulnerable to expose, where as anger as a mask is often a "strong front" to protect that sensitive hurt and vulnerability. Anger is trying to protect you from (perceived) imminent harm. (Not all anger, but i suspect in this case.)
I absolutely relate to what @Flutterbug9 said about the cycle of "anger, thinking, cant sleep, tiredness, more anger/emotions". I've had that insomnia cycle at time when something has triggered my anger or feeling of injustice especially.
I'm so glad you felt safe to vent here. 😊 I have often found that when I am angry about something it helps me so so much to be able to tell someone about it. To let it out. To be heard.
I'm so glad i can be part of you "being heard" (read) and being about to vent out those emotions. That is a really healthy thing to do I believe. 😊🥰🤗