Abstract: No unified tram standards have yet been formed in the whole Europe. As a result of this, technologies related to tramway often adopt incomplete applicable criteria of LRT (light rail tramway). With the development of cities, the traditional LRT standards can not satisfy the tramway construction and operation requirements. Currently, EU is drafting the tramway standards based on the CEN CENELEC GUIDE 26 and Mandate 486, with the participation of France, Germany, UK and other member countries. In this paper, the French STRMTG tramway standards are introduced, and combined with the Croydon tram accident which happened in South London in 2016, the importance of SIL2 on-board over-speed control is emphasized.