Parking and Highway Improvement (C-32) · Lesson 5 of 7
Removing Obsolete Markings: Limits and Pay Quantity
"Removing Obsolete Markings: Limits and Pay Quantity" is lesson 5 of 7 in the Parking and Highway Improvement (C-32) Learning Hub. It opens with "When Removal Comes First" and works through 5 short steps, then a worked example you can check yourself against.
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Steps in this lesson
When Removal Comes First
What a Removal Item Includes
Grinding Limits
High-Pressure Water Blasting
Pay Quantity
The worked example in the course applies this lesson to a realistic job in 5 steps, moving through "Solid stripe", "Broken stripe", "Pavement markings", and "Ground strip width".
What you'll be able to do
Explain the main idea of "Removing Obsolete Markings: Limits and Pay Quantity" in plain language you can use on the exam.
Apply this step with confidence: "High-Pressure Water Blasting".
Apply this step with confidence: "Pay Quantity".
Test yourself on the worked example and the quick-check quiz inside the classroom.
The diagram for this lesson, exactly as it appears in the Learning Hub.
The first steps of this lesson
Step 1: When Removal Comes First
Section 84-9 of the 2025 Caltrans Standard Specifications covers removing existing markings. Section 84-9.03A says to remove existing traffic stripes before making any changes to the traffic pattern, and Section 84-9.01C requires you to submit your proposed removal method at least 7 days before starting and to allow 2 business days for review. On a parking lot restripe the same logic applies: take out the obsolete stall lines before laying the new pattern so drivers never see two layouts.
Step 2: What a Removal Item Includes
Under Section 84-9.03A, remove traffic stripe includes removing pavement markers (including any markers in the gaps) within the line of removal, stripes of varying material, and stripes up to 20 inches wide, with the width including contrast. Pavement markings must be removed so that no part of the marking is still visible. Any area removed by grinding is to be rectangular.
Step 3: Grinding Limits
Remove contrast stripes, traffic stripes and pavement markings by methods that do not remove pavement to a depth of more than 1/8 inch (Section 84-9.03A). Limit the removal to the area bounded by 6 inches before and after the actual striping material and within 2 inches left and right of it. Water must not puddle in the ground areas, and ground areas on asphalt concrete pavement get a fog seal. For a 4-inch stripe the allowed ground strip is therefore 4 + 2 + 2 = 8 inches wide.
The remaining 2 steps, the worked example and the quiz are in the course. This is a preview. The full lesson, with the step-by-step explanations, a worked example and a quick-check quiz, is inside the classroom.
Independent exam preparation. Contractors Classroom is not affiliated with the Contractors State License Board, and no course can guarantee a passing result.
