Road lane lines that govern all of modern driving were allegedly invented by a frustrated doctor in California who watched a leaking milk truck drip a perfect white line down the center of a dusty dirt highway.

A closer look

Road lane lines that govern all of modern driving were allegedly invented by a frustrated doctor in California who watched a leaking milk truck drip a perfect white line down the center of a dusty dirt highway. Before this brilliantly simple accident, public roads were just a chaotic free-for-all where thousands of metal death traps hurtled past each other with absolutely no spatial boundaries, relying entirely on good vibes and sheer luck to avoid head-on collisions. We literally owe the foundational safety feature of global transportation infrastructure to a careless dairy farmer who forgot to tighten a valve on his cargo. It is wild to think that our primary defense against getting annihilated by an oncoming semi-truck is just a thin layer of paint inspired by spilled milk!