620.1 General (MUTCD Chapter 3A) - Revision history

Hoskir: Updated article due to MUTCD updates (See Special Ballot)

2026-01-07T14:42:21Z

Updated article due to MUTCD updates (See Special Ballot)

Legged1: /* 620.1.4 Materials (MUTCD Section 3A.04) */updated per RR4042

2025-05-27T21:13:47Z

620.1.4 Materials (MUTCD Section 3A.04): updated per RR4042

← Older revision		Revision as of 16:13, 27 May 2025
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	'''Support.''' The materials that MoDOT uses for pavement marking are:		'''Support.''' The materials that MoDOT uses for pavement marking are:

	:'''A. High Build Waterborne Paint.''' High Build paint can be applied in a thicker layer than normal waterborne paint High build paint may be applied at a wet thickness of up to 35 mils. Class 1 is applied at a wet thickness of 18 mils and Class 2 is applied at a wet thickness of 25 mils. See [[620.11 Guidelines for Using Water-Borne Traffic Paint\|EPG 620.11 Guidelines for Using Water-Borne Traffic Paint]].		:'''A. High Build Waterborne Paint.''' High Build paint can be applied in a thicker layer than normal waterborne paint. High build paint may be applied at a wet thickness of up to 35 mils; Class 1 is applied at a wet thickness of 18 mils and Class 2 is applied at a wet thickness of 25 mils. See [[620.11 Guidelines for Using Water-Borne Traffic Paint\|EPG 620.11 Guidelines for Using Water-Borne Traffic Paint]].

	:'''B. Cold weather paint.''' This material is used in special situations when specified. Cold weather paint is a water-based material that can be used at lower temperatures. Cold weather paint is normally applied at a wet thickness of 18 mils. See [[620.11 Guidelines for Using Water-Borne Traffic Paint\|EPG 620.11 Guidelines for Using Water-Borne Traffic Paint]].		:'''B. Cold weather paint.''' This material is used in special situations when specified. Cold weather paint is a water-based material that can be used at lower temperatures. Cold weather paint is normally applied at a wet thickness of 18 mils. See [[620.11 Guidelines for Using Water-Borne Traffic Paint\|EPG 620.11 Guidelines for Using Water-Borne Traffic Paint]].
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	'''Support.''' The night visibility of pavement markings is a direct result of the presence and quantity of the spherical glass or ceramic "beads" that are embedded in the pavement marking material. There are two types of beads used by MoDOT:		'''Support.''' The night visibility of pavement markings is a direct result of the presence and quantity of the spherical glass or ceramic "beads" that are embedded in the pavement marking material. There are two types of beads used by MoDOT:

	* Type P Beads.''' These are an intermediate blend of glass bead used by MoDOT forces and contractors when marking minor roadways. . The "P" stands for performance.		* '''Type P Beads.''' These are an intermediate blend of glass bead used by MoDOT forces and contractors when marking minor roadways. The "P" stands for performance.

	* Type L Beads.''' These are a “large” glass bead. These beads are used by MoDOT striping forces and contractors on major routes to provide a level of wet night time performance.		* '''Type L Beads.''' These are a “large” glass bead. These beads are used by MoDOT striping forces and contractors on major routes to provide a level of wet night time performance.

	'''Support.''' See [https://www.modot.org/missouri-standard-specifications-highway-construction ''Standard Specifications for Highway Construction'', Section 1048], for material specifications of pavement markings.		'''Support.''' See [https://www.modot.org/missouri-standard-specifications-highway-construction ''Standard Specifications for Highway Construction'', Section 1048], for material specifications of pavement markings.

Hoskir: /* 620.1.11 Traffic Marking Paint Application Rates */ updated per RR4042

2025-05-27T20:53:47Z

620.1.11 Traffic Marking Paint Application Rates: updated per RR4042

← Older revision		Revision as of 15:53, 27 May 2025
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	!style="background:#BEBEBE"\|Material !!style="background:#BEBEBE"\|Application Rate		!style="background:#BEBEBE"\|Material !!style="background:#BEBEBE"\|Application Rate
	\|-		\|-
	\|Cold Weather Paint\|\| 15 mils		\|Cold Weather Paint\|\| 18 mils
	\|-		\|-
	\|Waterborne Paint \|\| 15 mils ~~(Undivided Highways)~~		\|Class 1 High Build Waterborne Paint\|\| 18 mils
	\|-		\|-
	\|~~Waterborne Paint\|\| 20 mils (Divided Highways)~~		\| Class 2 High Build Waterborne Paint \|\| 25 mils
	\|-
	\|High Build Waterborne Paint\|\| 25 mils
	\|-		\|-
	\|Epoxy \|\| 25 mils		\|Epoxy \|\| 25 mils
	\|-		\|-
	\|Type PM Beads\|\| 10 lbs/100 sq. ft.		\|Type P Beads\|\| 10 lbs/100 sq. ft.
	\|-		\|-
	\|Type L Beads\|\| 15 lbs/100 sq. ft.		\|Type L Beads\|\| 15 lbs/100 sq. ft.
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	'''Guidance.''' Water borne paint should not be heated above 100 degrees Fahrenheit (refer to [[620.11 Guidelines for Using Water-Borne Traffic Paint\|Guidelines for Using Waterborne Traffic Paint]] for the application of water borne paint).		'''Guidance.''' Water borne paint should not be heated above 100 degrees Fahrenheit (refer to [[620.11 Guidelines for Using Water-Borne Traffic Paint\|Guidelines for Using Waterborne Traffic Paint]] for the application of water borne paint).

	During marginal weather conditions at the end of the striping season, in November and December, cold weather paint should be used.		During marginal weather conditions at the end of the striping season, in November and December, cold weather paint should be used.

	==620.1.12 Maintenance==		==620.1.12 Maintenance==

Hoskir: /* 620.1.7 Permanent Pavement Markings */ updated per RR4042

2025-05-27T20:51:45Z

620.1.7 Permanent Pavement Markings: updated per RR4042

← Older revision		Revision as of 15:51, 27 May 2025
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	The selection of permanent pavement markings shall be based on the [[:Category:620 Pavement Marking#Pavement Marking Guidelines\|Pavement Marking Guidelines table]].		The selection of permanent pavement markings shall be based on the [[:Category:620 Pavement Marking#Pavement Marking Guidelines\|Pavement Marking Guidelines table]].

	'''Support.''' Contract work consists of furnishing and installing durable intersection markings, cold weather paint, high build waterborne paint~~, waterborne pavement marking, or epoxy~~.		'''Support.''' Contract work consists of furnishing and installing durable intersection markings, cold weather paint or high build waterborne paint.

	'''Standard.''' On the final lift of resurfacing projects and on all new pavements, all pavement marking will be provided by contract. On surface treatment projects, all pavement marking will be provided by MoDOT.		'''Standard.''' On the final lift of resurfacing projects and on all new pavements, all pavement marking will be provided by contract. On surface treatment projects, all pavement marking will be provided by MoDOT.

Hoskir: /* 620.1.4 Materials (MUTCD Section 3A.04) */ updated per RR4042

2025-05-27T20:49:03Z

620.1.4 Materials (MUTCD Section 3A.04): updated per RR4042

Hoskir at 16:20, 5 November 2024

2024-11-05T16:20:02Z

← Older revision		Revision as of 11:20, 5 November 2024
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	'''Options.''' Where mechanical means of marking removal have been employed to completely remove the pavement marking, paint of a color matching the pavement surface or liquid asphalt materials may be used as a temporary means of covering contrasting pavement texture.		'''Options.''' Where mechanical means of marking removal have been employed to completely remove the pavement marking, paint of a color matching the pavement surface or liquid asphalt materials may be used as a temporary means of covering contrasting pavement texture.

			[[Category:620 Pavement Marking\|620.01]]
	[[Category:~~MUTCD Sandbox~~]]

Hoskir at 16:18, 5 November 2024

2024-11-05T16:18:34Z

← Older revision		Revision as of 11:18, 5 November 2024
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	[[Category:~~620 Pavement Marking\|620.01~~]]		[[Category:MUTCD Sandbox]]

Smithk: Updated website links for increased security

2021-10-26T16:06:01Z

Updated website links for increased security

← Older revision		Revision as of 11:06, 26 October 2021
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	:'''F. Temporary Pavement Marking Tape.''' Temporary pavement marking tape is used in locations where the marking will be in place no more than two weeks. It is cost effective only in small quantities. Short-term pavement marking is not normally removed. If removal is required, removable tape is the preferred material. Short term marking should not be used for temporary lane transitions or bypasses. Marking tape shall be applied as per manufacturer’s recommendation.		:'''F. Temporary Pavement Marking Tape.''' Temporary pavement marking tape is used in locations where the marking will be in place no more than two weeks. It is cost effective only in small quantities. Short-term pavement marking is not normally removed. If removal is required, removable tape is the preferred material. Short term marking should not be used for temporary lane transitions or bypasses. Marking tape shall be applied as per manufacturer’s recommendation.

	:'''G. Temporary Raised Pavement Markers.''' Temporary raised pavement markers are used on contract leveling course and resurfacing projects on two or three lane roadways with no passing zone center striping to provide a temporary centerline until permanent marking is replaced. Temporary raised pavement markers are used in combination with the [~~http~~://epg.modot.~~mo.gov~~/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_(MUTCD_6F)#616.6.47_NO_CENTER_LINE_Sign_.28WO8-12.29_.28MUTCD_6F.47.29 NO CENTER LINE sign]. Temporary markers should also be used to provide a temporary lane line on 2-lane roadways with climbing lanes. Temporary markers may also be used to supplement other pavement marking in areas where emphasis is needed, such as on bypasses and lane transitions.		:'''G. Temporary Raised Pavement Markers.''' Temporary raised pavement markers are used on contract leveling course and resurfacing projects on two or three lane roadways with no passing zone center striping to provide a temporary centerline until permanent marking is replaced. Temporary raised pavement markers are used in combination with the [https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_(MUTCD_6F)#616.6.47_NO_CENTER_LINE_Sign_.28WO8-12.29_.28MUTCD_6F.47.29 NO CENTER LINE sign]. Temporary markers should also be used to provide a temporary lane line on 2-lane roadways with climbing lanes. Temporary markers may also be used to supplement other pavement marking in areas where emphasis is needed, such as on bypasses and lane transitions.

	:Markers dividing two lanes of traffic in the same direction have one reflective face that is white in color. The edgeline markers with two lanes of traffic in the same direction are yellow for the left edgeline and white for the right edgeline. Markers dividing two lanes of traffic in opposite directions have two opposing reflective faces that are yellow in color. The edge line markers with two lanes in opposite directions are white.		:Markers dividing two lanes of traffic in the same direction have one reflective face that is white in color. The edgeline markers with two lanes of traffic in the same direction are yellow for the left edgeline and white for the right edgeline. Markers dividing two lanes of traffic in opposite directions have two opposing reflective faces that are yellow in color. The edge line markers with two lanes in opposite directions are white.
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	When used, blue markings shall supplement white markings for parking spaces for persons with disabilities.		When used, blue markings shall supplement white markings for parking spaces for persons with disabilities.

	'''Option.''' Colors for official route shield signs may be used as colors of symbol markings to simulate route shields on the pavement. Refer to [~~http~~://epg.modot.org/index.php/620.2_Pavement_and_Curb_Markings_(MUTCD_Chapter_3B)#620.2.20_Pavement_Word.2C_Symbol_and_Arrow_Markings_.28MUTCD_Section_3B.20.29 EPG 620.2.20]. Black may be used in combination with the colors listed in the first sentence of EPG 620.1.5 Standard where a light-colored pavement does not provide sufficient contrast with the markings.		'''Option.''' Colors for official route shield signs may be used as colors of symbol markings to simulate route shields on the pavement. Refer to [https://epg.modot.org/index.php/620.2_Pavement_and_Curb_Markings_(MUTCD_Chapter_3B)#620.2.20_Pavement_Word.2C_Symbol_and_Arrow_Markings_.28MUTCD_Section_3B.20.29 EPG 620.2.20]. Black may be used in combination with the colors listed in the first sentence of EPG 620.1.5 Standard where a light-colored pavement does not provide sufficient contrast with the markings.

	'''Support.''' When used in combination with other colors, black is not considered a marking color, but only a contrast-enhancing system for the markings.		'''Support.''' When used in combination with other colors, black is not considered a marking color, but only a contrast-enhancing system for the markings.

Smithk: Per TS, numerous minor clarifications

2020-08-11T15:52:28Z

Per TS, numerous minor clarifications

Show changes

Smithk: updated links

2018-12-27T18:09:28Z

updated links

← Older revision		Revision as of 13:09, 27 December 2018
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	:Markers dividing two lanes of traffic in the same direction have one reflective face that is white in color. The edgeline markers with two lanes of traffic in the same direction are yellow for the left edgeline and white for the right edgeline. Markers dividing two lanes of traffic in opposite directions have two opposing reflective faces that are yellow in color. The edge line markers with two lanes in opposite directions are white.		:Markers dividing two lanes of traffic in the same direction have one reflective face that is white in color. The edgeline markers with two lanes of traffic in the same direction are yellow for the left edgeline and white for the right edgeline. Markers dividing two lanes of traffic in opposite directions have two opposing reflective faces that are yellow in color. The edge line markers with two lanes in opposite directions are white.

	:See [~~http~~://modot.~~mo.gov~~/~~business~~/~~standards_and_specs/documents/62010.pdf~~ Standard Plan 620.10] for details on using temporary raised pavement markers.		:See [https://www.modot.org/media/16897 Standard Plan 620.10] for details on using temporary raised pavement markers.

	::Temporary raised pavement markers are used primarily on pavement surface treatment projects. Surface treatment is defined as any pavement surfacing as defined in [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=7 Sec 413] of the Standard Specifications. Type 1 markers are used for temporary edgeline marking and as part of the "cluster" marking of temporary lane lines.		::Temporary raised pavement markers are used primarily on pavement surface treatment projects. Surface treatment is defined as any pavement surfacing as defined in [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=7 Sec 413] of the Standard Specifications. Type 1 markers are used for temporary edgeline marking and as part of the "cluster" marking of temporary lane lines.
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	==620.1.8 Temporary Pavement Markings==		==620.1.8 Temporary Pavement Markings==

	'''Support.''' Temporary pavement marking consists of furnishing, installing, and maintaining pavement marking in work zones. [~~http~~://www.modot.~~mo.gov/business/standards_and_specs~~/~~documents~~/~~62010.pdf~~ Standard Plan 620.10] shows layouts for typical situations.		'''Support.''' Temporary pavement marking consists of furnishing, installing, and maintaining pavement marking in work zones. [https://www.modot.org/media/16897 Standard Plan 620.10] shows layouts for typical situations.

	Paint requires special equipment to install and remove, however material costs are low, so it is cost effective to install in large quantities. The advantage of paint is it can be installed faster than other types of pavement marking material. This is an advantage where striping must be placed under traffic. The primary disadvantage is that the removal of paint is expensive and will result in scarring of the pavement. A pay item for removal of paint will be included if removal is required.		Paint requires special equipment to install and remove, however material costs are low, so it is cost effective to install in large quantities. The advantage of paint is it can be installed faster than other types of pavement marking material. This is an advantage where striping must be placed under traffic. The primary disadvantage is that the removal of paint is expensive and will result in scarring of the pavement. A pay item for removal of paint will be included if removal is required.

← Older revision		Revision as of 15:49, 27 May 2025
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	Consideration should be given to selecting pavement marking materials that will minimize tripping or loss of traction for pedestrians, bicyclists and motorcyclists. Delineators should not present a vertical or horizontal clearance obstacle for pedestrians.		Consideration should be given to selecting pavement marking materials that will minimize tripping or loss of traction for pedestrians, bicyclists and motorcyclists. Delineators should not present a vertical or horizontal clearance obstacle for pedestrians.

	'''Support.''' ~~The [[#620.1.7 Permanent Pavement Markings\|materials that MoDOT uses for pavement marking]] are:~~		'''Support.''' The materials that MoDOT uses for pavement marking are:
	The materials that MoDOT uses for pavement marking are:

	:'''A. Waterborne Paint.''' ~~This material is the standard~~ paint ~~used by contractors and MoDOT forces. MoDOT forces use~~ waterborne ~~for all long line applications, while contracts should specify it on minor routes. Waterborne~~ paint may be applied at a wet thickness of ~~15 mils~~ to 24 mils. ~~It may also be used for intersection markings when the life~~ of ~~the pavement~~ is ~~not expected to outlast~~ a ~~more durable product (see [[#E. Preformed Pavement Marking Tape\|Preformed Pavement Marking Tape]])~~. See [[620.11 Guidelines for Using Water-Borne Traffic Paint\|EPG 620.11 Guidelines for Using Water-Borne Traffic Paint]].		:'''A. High Build Waterborne Paint.''' High Build paint can be applied in a thicker layer than normal waterborne paint High build paint may be applied at a wet thickness of up to 35 mils. Class 1 is applied at a wet thickness of 18 mils and Class 2 is applied at a wet thickness of 25 mils. See [[620.11 Guidelines for Using Water-Borne Traffic Paint\|EPG 620.11 Guidelines for Using Water-Borne Traffic Paint]].

	:'''B. High Build Waterborne Paint.''' High Build paint can be applied in a thicker layer than normal waterborne paint and it is used by contractors when specified. High build paint may be applied at a wet thickness of up to 35 mils. High Build is one of two options for material to be used in contractor installations on divided highways. See [[620.11 Guidelines for Using Water-Borne Traffic Paint\|EPG 620.11 Guidelines for Using Water-Borne Traffic Paint]].		:'''B. Cold weather paint.''' This material is used in special situations when specified. Cold weather paint is a water-based material that can be used at lower temperatures. Cold weather paint is normally applied at a wet thickness of 18 mils. See [[620.11 Guidelines for Using Water-Borne Traffic Paint\|EPG 620.11 Guidelines for Using Water-Borne Traffic Paint]].

	~~:'''C~~. Cold weather paint.''' This material is used in special situations when specified. Cold weather paint is a water-based material that can be used at lower temperatures. Cold weather paint is normally applied at a wet thickness of 15 mils. See [[620.11 Guidelines for Using Water-Borne Traffic Paint\|EPG 620.11 Guidelines for Using Water-Borne Traffic Paint]].
	<div id="E. Preformed Pavement Marking Tape"></div>		<div id="E. Preformed Pavement Marking Tape"></div>

	:'''D. Durable Intersection Marking Materials.''' Due to the excessive wear experienced in and around intersections, durable marking materials (preformed thermoplastic, cold applied tapes~~, extruded / sprayed thermoplastic~~ or plural component liquid) should be used to mark intersection markings (stop bars, yield bars, arrows, words, symbols, hash bars, shields, etc.) . These materials will remain in place longer and reduce maintenance requirements.		:'''C. Durable Intersection Marking Materials.''' Due to the excessive wear experienced in and around intersections, durable marking materials (preformed thermoplastic, cold applied tapes or plural component liquid) should be used to mark intersection markings (stop bars, yield bars, arrows, words, symbols, hash bars, shields, etc.) . These materials will remain in place longer and reduce maintenance requirements.

	:'''E. Temporary Removable Pavement Marking Tape.''' Temporary removable tape is used to delineate traffic lanes during construction. Preformed removable tape does not require special equipment to install or remove, however material costs are high, so it may only be cost effective in small quantities. The primary advantage is that the removal of this tape is inexpensive and will not scar the pavement. The primary disadvantages of tape are the higher material cost and weather constraints for installation. When establishing contract times and milestones, the potential timing of paving activities and weather constraints should be considered when selecting temporary pavement marking. A pay item for removal of the marking tape will be included if removal is required. Marking tape shall be applied as per manufacturer’s recommendation.		:'''D. Temporary Removable Pavement Marking Tape.''' Temporary removable tape is used to delineate traffic lanes during construction. Preformed removable tape does not require special equipment to install or remove, however material costs are high, so it may only be cost effective in small quantities. The primary advantage is that the removal of this tape is inexpensive and will not scar the pavement. The primary disadvantages of tape are the higher material cost and weather constraints for installation. When establishing contract times and milestones, the potential timing of paving activities and weather constraints should be considered when selecting temporary pavement marking. A pay item for removal of the marking tape will be included if removal is required. Marking tape shall be applied as per manufacturer’s recommendation.

	:'''F. Temporary Pavement Marking Tape.''' Temporary pavement marking tape is used in locations where the marking will be in place no more than two weeks. It is cost effective only in small quantities. Short-term pavement marking is not normally removed. If removal is required, removable tape is the preferred material. Short term marking should not be used for temporary lane transitions or bypasses. Marking tape shall be applied as per manufacturer’s recommendation.		:'''E. Temporary Pavement Marking Tape.''' Temporary pavement marking tape is used in locations where the marking will be in place no more than two weeks. It is cost effective only in small quantities. Short-term pavement marking is not normally removed. If removal is required, removable tape is the preferred material. Short term marking should not be used for temporary lane transitions or bypasses. Marking tape shall be applied as per manufacturer’s recommendation.

	:'''G. Temporary Raised Pavement Markers.''' Temporary raised pavement markers are used on contract leveling course and resurfacing projects on two or three lane roadways with no passing zone center striping to provide a temporary centerline until permanent marking is replaced. ~~Temporary raised pavement markers~~ are used in combination with the [https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_(MUTCD_6F)#616.6.47_NO_CENTER_LINE_Sign_.28WO8-12.29_.28MUTCD_6F.47.29 NO CENTER LINE sign]. ~~Temporary markers~~ should also be used to provide a temporary lane line on 2-lane roadways with climbing lanes. ~~Temporary markers~~ may also be used to supplement other pavement marking in areas where emphasis is needed, such as on bypasses and lane transitions.		:'''F. Temporary Raised Pavement Markers.''' Temporary raised pavement markers (TRPMs) are used on contract leveling course and resurfacing projects on two or three lane roadways with no passing zone center striping to provide a temporary centerline until permanent marking is replaced. TRPMs are used in combination with the [https://epg.modot.org/index.php?title=616.6_Temporary_Traffic_Control_Zone_Devices_(MUTCD_6F)#616.6.47_NO_CENTER_LINE_Sign_.28WO8-12.29_.28MUTCD_6F.47.29 NO CENTER LINE sign]. TRPMs should also be used to provide a temporary lane line on 2-lane roadways with climbing lanes. TRPMs may also be used to supplement other pavement marking in areas where emphasis is needed, such as on bypasses and lane transitions.

	:Markers dividing two lanes of traffic in the same direction have one reflective face that is white in color. The edgeline markers with two lanes of traffic in the same direction are yellow for the left edgeline and white for the right edgeline. Markers dividing two lanes of traffic in opposite directions have two opposing reflective faces that are yellow in color. The edge line markers with two lanes in opposite directions are white.		:Markers dividing two lanes of traffic in the same direction have one reflective face that is white in color. The edgeline markers with two lanes of traffic in the same direction are yellow for the left edgeline and white for the right edgeline. Markers dividing two lanes of traffic in opposite directions have two opposing reflective faces that are yellow in color. The edge line markers with two lanes in opposite directions are white.
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	:See [https://www.modot.org/media/16897 Standard Plan 620.10] for details on using temporary raised pavement markers.		:See [https://www.modot.org/media/16897 Standard Plan 620.10] for details on using temporary raised pavement markers.

	::Temporary raised pavement markers are used primarily on pavement surface treatment projects. Surface treatment is defined as any pavement surfacing as defined in [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=7 Sec 413] of the Standard Specifications~~. Type 1 markers are used for temporary edgeline marking and as part of the "cluster" marking of temporary lane lines~~.		::Temporary raised pavement markers are used primarily on pavement surface treatment projects. Surface treatment is defined as any pavement surfacing as defined in [http://www.modot.org/business/standards_and_specs/SpecbookEPG.pdf#page=7 Sec 413] of the Standard Specifications.

	:Temporary raised pavement markers do require removal after the permanent marking is in place. They do not require a pay item for removal.		:Temporary raised pavement markers do require removal after the permanent marking is in place. They do not require a pay item for removal.
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	'''Standard.''' Snow plowable raised pavement markers (SRPMs) are neither being installed new nor reinstalled on any more projects. If the district chooses to leave the SRPM’s in place, both the reflectors and the shoes shall be maintained. The districts must assure SRPMs that remain in the pavement are regularly inspected. Where cold milling is being done, the removal of the SRPMs is included in the cost of cold milling. On surface treatment and resurfacing projects SRPMs shall be removed before application of the surface treatment or resurfacing. SRPMs shall not be left in place and covered by surface treatment or resurfacing.		'''Standard.''' Snow plowable raised pavement markers (SRPMs) are neither being installed new nor reinstalled on any more projects. If the district chooses to leave the SRPM’s in place, both the reflectors and the shoes shall be maintained. The districts must assure SRPMs that remain in the pavement are regularly inspected. Where cold milling is being done, the removal of the SRPMs is included in the cost of cold milling. On surface treatment and resurfacing projects SRPMs shall be removed before application of the surface treatment or resurfacing. SRPMs shall not be left in place and covered by surface treatment or resurfacing.

	'''Support.''' The night visibility of pavement markings is a direct result of the presence and quantity of the spherical glass or ceramic "beads" that are embedded in the pavement marking material. There are ~~several~~ types of beads used by MoDOT.		'''Support.''' The night visibility of pavement markings is a direct result of the presence and quantity of the spherical glass or ceramic "beads" that are embedded in the pavement marking material. There are two types of beads used by MoDOT:

	~~:'''A.~~ Type P Beads.''' These are an intermediate blend of glass bead used by MoDOT forces and contractors when marking minor roadways. . The "P" stands for performance.		* Type P Beads.''' These are an intermediate blend of glass bead used by MoDOT forces and contractors when marking minor roadways. . The "P" stands for performance.

	~~:'''C.~~ Type L Beads.''' These are a “large” glass bead. These beads are used by MoDOT striping forces and contractors on major routes to provide a level of wet night time performance.		* Type L Beads.''' These are a “large” glass bead. These beads are used by MoDOT striping forces and contractors on major routes to provide a level of wet night time performance.

	'''Support.''' See [https://www.modot.org/missouri-standard-specifications-highway-construction ''Standard Specifications for Highway Construction'', Section 1048], for material specifications of pavement markings.		'''Support.''' See [https://www.modot.org/missouri-standard-specifications-highway-construction ''Standard Specifications for Highway Construction'', Section 1048], for material specifications of pavement markings.