Despite a surge of multidisciplinary interest in transition studies on low-carbon mobilities, there has been little evaluation of the current state of the field, and the contributions of different approaches such as the multi-level perspective (MLP), theories of practice, or the new mobilities paradigm. As a step in this direction, this contribution brings together scholars representing different theoretical perspectives and disciplinary fields in order to discuss processes and uneven geographies of mobility transitions as they are currently theorized. First, we reflect upon the role of geographers and other social scientists in envisioning, enabling, and criticizing mobility transitions. Second, we discuss how different theoretical approaches can develop mobility transitions scholarship. Finally, we highlight emerging issues in mobility transitions research.