Which type of reference point is tangible?

A tangible reference point is something that can be physically measured or seen in the environment. Road signs fit this definition perfectly; they are physical objects placed along the roadway, providing clear and immediate visual points of reference for drivers and investigators alike during a traffic crash investigation.

For example, when determining the location of a crash, investigators can use the position of a road sign to pinpoint where the incident occurred, as these signs are fixed and their locations are well-documented.

In contrast, police vehicles, while present at the scene and important for many operational reasons, are not inherently a reference point unless they are specifically positioned or marked in a way relevant to the crash. Witness testimony is subjective and can vary significantly from person to person, making it less reliable as a concrete reference. Street names, although useful for navigation and identification of areas, do not physically exist in a way that can be measured or seen, unlike the solid presence of road signs.