MAKING ROADS SMART: LONG-RANGE LOW-ENERGY WIRELESS TRAFFIC SIGNS - Antonio Pérez Yuste; Francisco Aznar Ballesta; Marta Gil Barba; Juan Moreno García-Loygorry; María Castillo Moral; Jesús Sánchez García (Investigador principal (IP)); AZNAR BALLESTA, FRANCISCO (Investigador/a) (2021)