What role do traffic control devices play in crash investigations?

Traffic control devices are essential in crash investigations as they provide vital context regarding the compliance of drivers with relevant traffic laws. When examining a crash scene, investigators look for traffic signs, signals, and roadway markings to understand how they may have influenced driver behavior. For instance, a stop sign may indicate that a driver failed to yield the right of way, or a traffic signal may reveal if a driver ran a red light. This information can clarify the actions of drivers involved and help determine fault or contributing factors to the crash.

While other options address aspects related to traffic control devices, they do not capture the primary role these devices play in crash investigations. The determination of the exact cause of a crash, the indication of speed limits, and the issuance of citations are all influenced by traffic control devices but are ancillary to their main function of providing context about compliance with traffic laws during the incident.