RecruitingBehavioural interventionAssessing the Use of MY-RIDE, a Just-in-time Adaptive Intervention, to Improve HIV Prevention and Substance Use in Youth Experiencing HomelessnessThe purpose of this study is to determine whether Motivating Youth to Reduce Infections, Disconnections, and Emotion dysregulation (MY-RIDE) decreases substance use , to determine whether MY-RIDE increases human immunodeficiency virus (HIV) prevention strategies and to evaluate MY-RIDE effects on willingness to take Pre-Exposure Prophylaxis (PrEP), stress, substance use urge, and use of mental health and substance use services when compared to attention control youth