I’ve not seen an intersection with four blinking yellow lights in California; typically two ways are blinking yellow (caution) and the other two are blinking red (stop).

Ferrari

So expensive, looks great, takes significant capital to maintain, and anyone who has one uses something else when they actually need to do something useful.

And use SVG when you can; bitmaps which should be vectors are frequently big and ugly.

shutdown: command

Depends heavily on the kind (and intensity) of radiation. Beta (electron/positron) and gamma (photon) generally won’t, but neutron and alpha can. Many of the atoms that become radioactive will rapidly decay, and that’s one of the mechanisms behind the impact to structural integrity.