Texas Reference Marker Assembly

Purpose:
 The Texas Reference Marker Assembly provides the tie in the field to the Texas Reference Marker System. These sign installations are provided primarily for TxDOT use in referencing locations on a highway.
Components:
 The following components make up a Reference Marker installation:
  • Standard:
     Route sign, Texas Reference marker (front and back of post).
  • Optional:
     Cardinal Direction auxiliary sign.
Installation:
 The following factors describe how the Texas Reference marker should be installed.
  • It is located approximately every 2 miles on a highway.
  • The preferred installation is:
    • On alternating sides of an undivided highway (4 miles between installations on the same side of the highway).
    • On both sides of a divided highway (2 miles between installations on the same side of the highway). When installed on both sides of a divided highway, one side is the primary installation. The secondary installation must be exactly opposite of the primary installation.
  • It is installed on both the front and back of the post for all installations.
  • A reference marker should not be installed on the approach to an intersection (i.e., a reference marker installation should not be located between the intersection and the first sign informing the driver of the intersection, such as the Highway Intersection Ahead or Junction sign).
  • On concurrent (or overlapping) routes, the reference marker numbers for the higher class highway are used (see ‘Arrangement by Class of Highway’ on page 3-22). If the concurrent highways are of the same class, the reference marker numbers for the lower-numbered route are used.
Figure 3-30 illustrates installation of a Texas Reference Marker.
Texas Reference Marker Assembly (click in image to see full-size image)
Figure 3-30. Texas Reference Marker Assembly