Back when I rode, I made a little arrangement of LEDs around the speedometer in 3 concentric rings of ~32 lights. The blue LED closest to pointing North would light, the green LED would always point towards my home, and the red LED would point towards my destination (programmable before the trip). That's all I really needed. Basically a small version of a navigation arrow above video game characters. It meant that one glance at the speedometer gave me all critical information in one instant. The brain is really good at intuitively figuring out parallax, so if I was moving, two glances gave me a good idea of distance as well, though I experimented with lighting 1,3,5,7,9 LEDs as the destination got closer.