Digital Billboards
Digital billboards are often too bright and cause me to be very angry. I personally like to be able to see where I am driving. I highly suggest a built in daylight sensor, so that the billboards can be bright enought to read during the day and dark enough to blind people at night.
Bright billboards are often dangerously bright and should be regulated by the city council. If something is dangering the lives of people, there needs to be rules.