Safe and efficient freight movement depends on sufficient and strategically located truck parking. Federal hours of service regulations require drivers to take breaks at defined intervals, leading to a search for parking ahead of their allowable drive time expires or while staging for their pick-up and delivery slots. This results in lost productivity, higher shipping costs, safety and environmental impacts of circulating trucks, and increased congestion. NCHRP Web-Only Document 415: Developing a Guide for Truck Parking Information Management Systems, from TRB's National Cooperative Highway Research Program, is supplemental to NCHRP Research Report 1137: Guide for Truck Parking Information Management Systems.