GRINDING FOR GROOVED-IN PAVEMENT MARKINGS
PART 1 GENERAL
1.1SECTION INCLUDES
A.Pavement grinding for the installation of grooved-in pavement markings.
1.2RELATED SECTIONS Not Used
1.3REFERENCES
A.ASTM D 4285: Indicating Oil or Water in Compressed Air
1.4DEFINITIONS
A.Pavement Markings - Are both Pavement Messages and Pavement
Striping.
B.Pavement Messages – Markings generally placed perpendicular to and
across the flow of traffic such as word, symbol, and arrow markings; stop, yield, and crosswalk lines; speed measurement markings; parking space markings; markings on shoulder such as chevron markings, and others.
C.Pavement Striping – Lines placed parallel and adjacent to the flow of
traffic such as lane lines, center lines, edge lines, channelizing lines and others.
1.5SUBMITTALS
A.Pavement marking manufacturer’s recommendations for groove
installation and cleaning for information.
PART 2 PRODUCTS
2.1EQUIPMENT
A.Provide a machine that:
1.Is capable of grinding or cutting to the required depth and cross
section.
Grinding For Grooved-In Pavement Markings
2.Is capable of providing a surface profile that meets pavement
marking manufacturer’s recommendations.
3.Has sufficient power, traction, and stability to maintain an accurate
depth of cut.
B.Walk-behind machines are not allowed for pavement striping.
C.Use appropriate cleaning equipment capable of sweeping, blowing out
and picking up millings during and after grinding operations.
PART 3 EXECUTION
3.1PREPARATION
A.Establish horizontal control line for grinding by placing control points as
needed.
3.2GRINDING
A.Grind pavement for pavement striping and in pavement message areas to
specified depth, width, and length.
1.Maintain 1 inch to 3 inch between the groove edge and the Portland
Cement Concrete Pavement (PCCP) longitudinal joint or place the groove within 2 inch of the control line on Asphalt pavements, or as shown.
2.Do not grind bridge decks and approach slabs for pavement
markings.
B.Groove Depth
1.Epoxy Paint
a.Minimum depth of 100 mils and a maximum depth of 120
mils.
2.Waterborne Paint
a.Minimum depth of 60 mils and a maximum depth of 80 mils.
3.Preformed Thermoplastic
a.All single layer preformed thermoplastic messages and
markings: minimum depth of 110 mils and a maximum depth of 200 mils.
4.Tape
a.Minimum depth of 160 mils and a maximum depth of 200
mils.
Grinding For Grooved-In Pavement Markings
C.Groove Width
1.Grind at full groove depth a maximum of 1 inch wider than the width
of the pavement striping.
2.Grind at full groove depth a minimum of 1 inch beyond outer
pavement message dimensions.
D.Groove Length
1.Grind at full groove depth a maximum of 2 inches longer than the
length of the pavement striping.
2.Grind at full groove depth a minimum of 1 inch beyond outer
pavement message dimensions.
3.3CLEANING
A.Remove millings and clean the surface as work progresses.
1.Milled material is the property of the Contractor.
2.Use an air compressor capable of producing a minimum of 185 cfm
and 120 psi to remove fine dust from the groove.
a.Use compressed air free of oil and water.
1) Refer to ASTM D 4285.
3.Follow any additional manufacturer’s recommendations for groove
cleaning.
END OF SECTION
Grinding For Grooved-In Pavement Markings
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Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 878–880 of 1,331.
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