Sustainable urban mobility plans (SUMP) have been trying to solve mobility issues by identifying suitable measures to be implemented according to citizen's behaviour and their expected impact. With the aim of improving the actual process of urban mobility development, here it is presented a new methodology, the mutual learning workshop (MLW). This methodology is specially designed to facilitate the joint work of experts advising SUMPs development. A total of 4 MLW were organised and 12 J. Valero-Gil et al. different urban mobility topics were approached. Discussion processes were moderated by experts in urban mobility from nine countries, who were leading the worktables and role playing activities. Using such methodology, the results of the 36 topics discussion and 12 role play activities are presented as important topics detected in the development of SUMPs and best practices found throughout Europe.