I mounted a rechargeable flashing warning light on mine after someone almost rear ended me.  It's been a game changer.  Haven't had a "near miss" since. You get these on Amazon and then I just used an "L" bracket I already had. With this, I feel confident I am as safe as a normal bike. I still use a flag but feel they help more with people coming from you left or right at a 4 way stop, for example. YouTube link is below. 

[![enter image description here][1]][1]

https://youtube.com/shorts/YSnK0S5S5AU?si=BhlBSvFpUU19ourU


  [1]: https://i.sstatic.net/L8qst.gif