Long Description Figure 2. Advance Warning Sign Spacing Illustration

This figure illustrates an example of lane closure with advance warning signs.

At the bottom of the figure to the right of the shoulder and to the left of the solid yellow line on the median, there are two symbols denoting the placement of signs. The signs read "ROAD WORK AHEAD." These signs are shown at a dimensioned distance C in advance of two more signs that read "RIGHT LANE CLOSED AHEAD." These signs are shown at a dimensioned distance B in advance of two more signs. These signs show a thick, vertical straight line on the left; a thick, vertical line on the right that angles toward the left half way up; and a thin, short vertical dotted line between them that is the length of the vertical section of the line on the right, denoting that the right lane ends. At this point, a series of channelizing devices are shown beginning at the right edge of the right shoulder and tapering to the left for a dimensioned distance A to the solid white line separating the shoulder from the right lane. This shoulder taper is labeled optional. Where the channelizing devices cross the solid white line between the shoulder and the right lane, a horizontal rectangular black arrow panel with a yellow directional arrow pointing to the left is shown across the shoulder. At this same point, the channelizing devices are shown tapering to the left for a dimensioned distance L to the broken white line between the northbound lanes. They then are shown continuing through a buffer space labeled optional.

Note that the exact measurements for spans A, B, and C depend upon road type. These measures are provided in Table 1.

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