California Department of Transportation

Roadside Management Toolbox


Treatment Gravel Mulch Irrigated Vegetation Patterned Concrete Pavement Rock Blanket Rock Slope Protection (RSP)
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Area(s) of use All Areas All Areas Urban/Suburban Urban/Suburban Transition/Rural
and Natural
Est. Installed Cost $10 - $23/yd2 $16 - $24/yd2 $100 - $125/yd2 $85 - $120/yd2 $25 - $85/yd2
Constructability 5 4 4 3 4
Ease of Repair 8 7 4 5 5
Context Adaptable Use locally obtained gravel to match local soil color Match to existing vegetation Variable color/texture, match to corridor Variable color/texture Use locally obtained material to match color
Life Cycle (years) 5-8 15-20 15-20 15-20 10-12
Consult with Maint. Maint., L. Arch Maint., L. Arch, Enviro. Maint., Traffic, L. Arch Maint., L. Arch
Comments Use only in combination with geotextile barrier or herbicidal fabric under mulch. See detail. Slope installation may require cellular confinement material for stability. Requires establishment period to control weeds until full coverage is attained. Proper base design and preparation is necessary to prevent cracking and subsequent weed growth. Matching color and pattern for repairs is difficult. In gores or other traffic areas cobble "roughness" must be limited, see detail. Installation adjacent to guard rail posts requires "leave-out" section. Repair and replacement is typically minimal and can be conducted by Maintenance crews with existing equipment. Vegetation may occur in spots.


Updated: Wednesday, May 24, 2012