More demand for truck parking than available capacity is a challenge facing state transportation agencies. When this occurs, trucks may choose to park on roadway shoulders. Many states have deployed systems to automatically monitor/detect truck parking availability and communicate this information to truckers as they are approaching truck parking facilities. This is typically accomplished through in/out systems that monitor/detect vehicles as they enter and leave truck parking lots or by space-by-space systems that monitor/detect individual truck parking spaces. ENTERPRISE members have had some experience with truck parking detection and expressed interest in better understanding these technologies, components, and dissemination mechanisms. Other key interests were innovative truck parking detection concepts and methods, safety concerns and roadway maintenance issues with trucks parking illegally or on the shoulders at rest areas, maintenance efforts for truck parking detection systems, and other industries that utilize vehicle detection technology. Documenting examples of these truck parking interests was accomplished through outreach with ENTERPRISE member states and a literature review.