The book "Travel Behaviour Modification (TBM) Program for Adolescents in Penang Island" offers a comprehensive analysis of the possibilities for changing the travel behavior of adolescents on Penang Island. It examines how travel behavior modification can be used as an effective tool to promote environmentally friendly mobility. The focus is on the use of public transportation, particularly buses, and their role in a sustainable urban lifestyle. The study is based on the participation of adolescents in the "Reduce Carbon Footprint Campaign," which aimed to raise awareness of sustainable transportation options and environmentally friendly behavior. Through various interventions, such as motivational sessions and travel planning training, a practical approach to promoting environmentally conscious mobility is presented.