The idea is to reduce the number of clicks needed for "common" tasks. For example, I mostly use one of the three traffic levels for my side of the other side as well as vehicles stopped on the shoulder, again for both sides. If clicking the Hazard pin popped up this list as simple icons first, it's two clicks to complete any of those common tasks. There could still be a "more" option for other details and if it's a editable list then it could be customised per user.