Annoyingly, they didn't fix my main UX gripe with delivery vehicles, which is that they use the same lights for the hazards and turn signals. It's quite common for the right half of a stopped van to be obscured, which makes it impossible to tell the difference between "hazards on, delivering a package" and "left blinker on, about to cut in front of you".
I don't know this for a fact, but it could very well be mandated by vehicle safety standards regulations. Of course, it wouldn't be very difficult to add extra lights like those you would see on the back of a tow truck or construction vehicle, but again that may be dictated by law.
https://www.fedsig.com/sites/default/files/products/Ambu.jpg
Commuter busses do not have this rule
You can't fix stupid. If the delivery guy is cutting in front of you without looking in their mirror, it's on them. Introducing a new set of lights will further confuse people who aren't delivery drivers and have no idea what those lights mean.
https://www.fedsig.com/sites/default/files/products/Ambu.jpg
Hope you're doing well :)