RecruitingBehavioural interventionPeer Facilitated Waitlist Controlled Transportation StudyThe goal of this clinical trial is to test the effectiveness of a peer-facilitated travel intervention in adults with serious mental illnesses. This project aims to address the following hypotheses: 1. Individuals with SMI receiving either of the two peer-mediated travel training transportation interventions will experience an increase in transportation self-efficacy and transportation skills. 2. Participants in the intervention arms will increase their transport utilization, participate in significantly more activities in the community, and make significantly more trips in the community. 3. Individuals with SMI receiving peer-mediated travel training interventions will retain post-test levels of community participation and self-efficacy 2 months after intervention. Participants will be assigned to an 8-week travel-training intervention either using a bike-share program or public transportation. All participants will complete three data-collection research interviews.