" .....I question how many 20/30 somethins know what the hand signals mean......"

I tend to agree fourty1. I built an old Harley bout 10 years ago and elected for a bit cleaner look on the bars and front forks by deleting the turn signals.

About getting nailed a couple of time was enough for me, it got signals. I was courious and have asked some of the 15-25 year old kids over the years (especially when the suject of bikes come up) if Drivers ED teaches arm signals. The answer....NO.