Division 600 — Section 631
600-183 Section 631 — Removal of Existing Pavement Markings
631.1 Description
1 Remove existing pavement markings and capture the removed material as specified.
631.2 Material
1 None specified.
631.3 Construction
1 Remove the existing long lines (edge lines, lane lines , gore markings) on the interstate highway mainline and ramps by water blasting, sandblasting, grinding, or other method approved by the RCE. Do not use chemicals for removal of existing markings. Upon completion of the removal, ensure that the pavement surface is in proper c ondition for bonding of the new marking material. 2 On smooth surfaces, remove at least 95% of the existing lines and ensure that there are no conflicts with the new pavement markings . On open- graded asphalt or grooved concrete surfaces, remove the existing lines so that none of the marking material remains above the pavement surface (i.e., the existing marking is planed even with the pavement surface). Residual material may remain in the grooves or voids on such surfaces. 3 When removing existing markings from the pavement surface, provide a positive means to control dust and accumulation of debris resulting from the removal operation. Capture the removed material us ing a separate vacuum equipped vehicle or other approved system to prevent its dispersal, and properly dispose of the material. No visible marking material debris may remain on the pavement shoulders. Ensure that the recovery system is within a maximum of 75 ft behind the removal operation. If the recovery system fails, cease the removal operations until the recovery system is operating properly. Clean up, remove, and dispose of excess or waste materials from the project site. 4 Ensure that the removal operation and the dust and debris collection operation do not damage existing pavement surfaces (concrete or asphalt) or damage pavement joint materials. Repair any significant damage occurring because of removal operations to the satisfaction of the RCE . 5 Where the existing symbol markings (arrows, words, etc.) differ from or are in conflict with the Plans or the Standard Drawings , the RCE will determine which to follow. For symbol marking relocation or replacement, remove 95% of the conflicting markings (and ensure that there are no conflicts with the new pavement markings ) by buffing, water blasting, sand blasting, or otherwise ensuring that the pavement surface is in proper condition for adequate bonding of the new thermoplastic markings.
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