It is our pleasure to hand over to you this book of proceedings for the 9th international conference on pedestrian and evacuation dynamics, held on August 21-24, 2018 in Lund, Sweden. The conference was organized by RISE Research Institutes of Sweden in collaboration with Lund University. The three-day conference hosted about 135 participants. Every day at the conference was introduced by a keynote lecture. The first lecture Putting the Pedestrian back into PED: the need to reunite our diverging field helt by Dr. Aoife Hunt, Associate Director and specialist in crowd planning at Movement Strategies AS. The second day was opened with the lecture Pedestrian movement in buildings using BIM (Building Information Modelling) by Jan Karlshøj, Associate Professor at the Technical University of Denmark. The topic of day three was Universal design - accounting for people by Per Olof Hedvall from Associate Professor at Lund University and head of Certec, the center for Rehabilitation Engineering and Design. The scientific program of the PED conference included many topics related to pedestrian dynamics as well as evacuation. The parallel sessions covered the following areas: Data collection; Experimental evacuation; Human behaviour; Model development; Simulations. The papers peer reviewed and published as open source by RISE and Collective Dynamics. We are very proud to present the peer reviewed papers. The publications demonstrate a significant scientific depth and also a high societal relevance.