The Legible London project began in 2003 as an initial study working with the central London boroughs and business fora, aiming not just to improve signs, but to offer far better guidance for walkers. The project was to run a prototype, a measurable trial to prove the concept. They set about developing a taxonomy of walkers, but when they had discovered sixty different types and were still counting they gave up, and instead measured walking activity along two axes, the walkers' knowledge of the area and their speed, defined on a continuum from strolling to striding.