I would not wear such a vest. When combined with the checkered band on both the helmet and the vest, it may come pretty close to impersonating police. While the initial reaction of drivers would be to take more notice of your presence, there is a chance that once an agro driver recognizes that you are not a police officer, their reaction could be quite the opposite of what you are trying to achieve.
Wear a High Viz vest by all means, but not one that might work against you in some circumstances, and I'd seek some professional advice before using it.