Application of Object Markers (Texas MUTCD, Section 2C.65)
Figure 8-2 shows how guardrail end treatments are marked with object markers. Note that when the energy absorbing treatment is used, a post mounted object marker is not required if a guardrail end treatment object marker is built into the side of the treatment facing traffic.

Figure 8-2. Object Marker at Energy Absorbing Treatment (EAT)

Figure 8-3. Object Marker at Turndown (Texas Twist)
See Table 8-1 for various object marker applications.