Delaware Administrative Code
Title 2 - Transportation
2000 - Department of Transportation
2400 - Division of Transportation Solutions
2402 - Manual on Uniform Traffic Control Devices (MUTCD)
Part 3 - Marking
Chapter 3B - PAVEMENT AND CURB MARKINGS
Section 3B.13 - Raised Pavement Markers Supplementing Other Markings

Universal Citation: 2 DE Admin Code 3B.13

Current through Register Vol. 28, No. 3, September 1, 2024

Guidance:

01 (DE Revision) The use of retroreflective or internally illuminated raised pavement markers for supplementing longitudinal line markings should comply with the following:

A. Lateral Positioning
1. When supplementing double line markings other than double yellow center lines, pairs of raised pavement markers placed laterally in line with or immediately outside of the two lines should be used.

2. When supplementing wide solid line markings, pairs of raised pavement markers placed laterally adjacent to each other should be used.

3. When supplementing wide dotted lane line markings, single raised pavement markers should be aligned with the centerline of the dotted lane line markings.

B. Longitudinal Spacing
1. When supplementing solid line markings, raised pavement markers at a spacing no greater than N (see Section 3B.11) should be used, except that when supplementing channelizing lines or edge line markings, a spacing of no greater than N/2 should be used.

2. When supplementing broken line markings, a spacing of N or 2N should be used depending on the application. However, when supplementing broken line markings identifying reversible lanes, a spacing of no greater than N should be used.

3. When supplementing dotted lane line markings, a spacing of 48 feet should be used.

4. When supplementing longitudinal line extension markings through at-grade intersections, one raised pavement marker for each short line segment should be used.

5. When supplementing line extensions through freeway interchanges, a spacing of no greater than N should be used.

6. When supplementing channelizing lines through intersections, a spacing of N should be used.

02 Raised pavement markers should not supplement right-hand edge lines unless an engineering study or engineering judgment indicates the benefits of enhanced delineation of a curve or other location would outweigh possible impacts on bicycles using the shoulder, and the spacing of raised pavement markers on the right-hand edge is close enough to avoid misinterpretation as a broken line during wet night conditions.

Option:

03 Raised pavement markers also may be used to supplement other markings such as channelizing islands, gore areas, approaches to obstructions, or wrong-way arrows.

04 (DE Revision) To improve the visibility of horizontal curves, center lines may be supplemented with retroreflective or internally illuminated raised pavement markers for the entire curved section as well as for a distance in advance of the curve that approximates 5 seconds of travel time (see Figures 3B-15D and 3B-15E).

Disclaimer: These regulations may not be the most recent version. Delaware may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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