Growing from research in the Strategic Highway Research Program 2 and subsequent support within the Federal Highway Administration Office of Operations, Transportation System Management and Operations (TSMO) capability maturity models and frameworks have been widely promoted to State departments of transportation. With over five years of application, a body of knowledge is now available on how best to advance capability maturity. Different program areas under TSMO have particular needs. These differences have led to varying approaches to promote the concept of capability maturity. There have also been challenges in advancing capability maturity, from explaining the value, gathering interest, supporting follow-up activities, and linking capability maturity to broader TSMO initiatives. This report presents six case studies of agencies that have used TSMO capability maturity models to advance their programs.