There are tiny ants all over SE Asia that run amazingly fast. I can see why this is a big advantage. They cover lots of ground. When they find some yummy thing they get back home and tons of buddies follow them to the reward. It is amazing how fast they ram into each other.
These ants are pretty amazing example of evolution. But you also can see how a pretty simple tweak of trying to lay out "lanes" for travel could help. The ones I watch don't seem to use lanes at all, so they are constantly bashing into ants going the other direction. Which they seem to cope with perfectly fine, but it has to slow them down and waste energy.
Evolution is amazing but it does often also end up with designs that have bits you could intelligently tweak to seemingly great advantage.
continue reading: Ants and Traffic Jams