822.5 Type IV Management Area Guidelines (Undeveloped Areas on Undivided Highways)
The height of vegetation should be maintained between 6 and 18 inches. Mowing should begin when 50 percent of the vegetation reaches 18 inches in height.
Vegetation may be maintained by using PGR or by mowing. The area for control of vegetation should include a distance from 6 to 15 feet from the edge of the traveled way. This is intended to be one pass with the type of equipment used.
A final mowing may be done if the slopes are 3 to 1 or flatter. It should not begin until the chance of significant regrowth is minimal. The final mowing area may extend 30 feet from the edge of the traveled way. Right-of-way totaling 80 feet or less may be mowed if needed.
Slopes steeper than 3 to 1 and areas not required to be mowed should be planted to wildflowers and native grasses, encouraged to naturalize or landscaped.
