Salzburg-based partners Salzburg Research and VIABIRDS Technologies are teaming up to gain behavioural insights concerning the intention and willingness of online shoppers to choose sustainable delivery options when it is offered to them on e-commerce sites. First, the currently most effective behaviour change interventions (i.e., digital nudges) for sustainable consumer delivery choices on e-commerce sites in studies and in practice will be analysed. After a state-of-the-art analysis including an open ideation campaign and co-creation workshops with local stakeholders, an inventory of novel, research-based digital nudges to encourage online shoppers to choose sustainable modes of delivery will be designed – transferring interventions from other fields. In the Salzburg research pilot, a webshop simulator that emulates a local shop has been developed to test the effectiveness of inventory of developed digital nudges among diverse user groups.