A research titled ‘Measuring accident risk exposure for pedestrians in different micro-environments’ co-authored by S.Lassarre, E.Papadimitriou, G.Yannis and J.Golias was published in the Journal Accident Analysis and Prevention in November 2007. A model of pedestrians’ crossing behaviour along a trip is developed, based on a hierarchical choice between junctions and mid-block locations and taking account of origin and destination, traffic characteristics and pedestrian facilities. A complete framework is produced for modelling pedestrians’ exposure in the light of their crossing behaviour. The feasibility of this approach is demonstrated on an artificial network and a first set of results is obtained from the validation of the models in observational studies.