1900. The fashion of macadam.

At this stage, the roads were still designed for the transit of animal-drawn vehicles. Most I had strong macadam, a type of very fashionable pavement named in honor of its creator, McAdam. It was the best of times, but soon discovered its limitations and was losing enthusiasm for their use. Among other reasons, because both drivers and passers greatly bothered them the dust rising to the passage of vehicles, and that turned the streets into a stifling place. In Paris he even become a league against dust.

In Spain, in 1906, solution to the problem came through the tarred. With this, besides convenience, roads gained in strength: the three years that lasted the ordinary firm is able to arrive at seven or eight. Yes, the cost of construction rose in 22 cents per square meter.