Figure 10C-1. Highway-Rail Grade Crossing (Crossbuck) Regulatory Signs
This figure shows two highway-rail grade crossing regulatory signs and an example of how these signs are mounted.
R15-1 is shown as composed of two horizontal rectangular white signs placed one on top of the other to form an "X," denoting a crossbuck. In black letters, the word "RAILROAD" is shown on the piece running from northwest to southeast, and the word "CROSSING" is shown on the piece running from southwest to northeast. A note states that the sign is drilled for 90-degree mounting.
R15-2 is shown as a horizontal rectangular white sign in an inverted T-shaped design, with the numeral "3" in black on the top section above the word "TRACKS" in black on the bottom section.
The example of mounting the R15-1 and R15-2 signs shows them mounted together on a post with the crossbuck above the supplemental sign.
The post is shown as a dimension of 225 mm (9 in) wide. A white retroreflective strip is shown as a dimension of 50 mm (2 in) wide and attached to the front of the post a dimensioned distance of 0.6 m (2 ft) MAX from the ground surface.
Each of the four arms of the crossbuck is shown as a dimension of 225 mm (9 in) wide and 1,200 mm (48 in) long and shown mounted at a 90-degree angle to each other. The center of the crossbuck is shown at a dimensioned distance of 2.8 m (9 ft) above the roadway level, but a note states "Height may be varied as required by local conditions."
The R15-2 sign is shown mounted a dimensioned distance of 450 mm (18 in) below the center of the crossbuck. Each of the two sections of the sign is shown as a dimension of 225 mm (9 in) high. The wider, bottom section is shown as a dimension of 675 mm (27 in) wide.