Spanish Autonomous Communities have been approving Transport Laws for regional and
urban services for more than thirty years. An analysis comparing these rules allows us to see
how they have evolved towards greater involvement in sustainable mobility. From simple
texts, which are limited to delimiting competences and ordering coordination between
Administrations, to rules that assume the drawbacks of the current mobility model. The most
recent Laws introduce in its principles and objectives the promotion of sustainable public
transport from the socioeconomic and environmental aspects. This means offeríng
conditions of universal accessibility and universal design and encourages the introduction of
information and communications technology and quality at service. This paper is a review
of this evolution, highlighting those Laws that have been milestones and culminating with
the last two: that of the Principality of Asturias and that of Castile and León. Even with some
shortcomings, this introduction represents a commitment by the legislator to sustainable
mobility and quality public transport.
