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 3J - RUMBLE STRIP MARKINGS
Section 3J.01 - Longitudinal Rumble Strip Markings

01 Longitudinal rumble strips consist of a series of rough-textured or slightly raised or depressed road surfaces intended to alert inattentive drivers through vibration and sound that their vehicle has left the travel lane. Shoulder rumble strips are typically installed along the shoulder near the travel lane. On divided highways, rumble strips are sometimes installed on the median side (left-hand side) shoulder as well as on the outside (right-hand side) shoulder. On two-way roadways, rumble strips are sometimes installed along the center line.

02 (DE Revision) This Manual contains no provisions regarding the design and placement of longitudinal rumble strips. The provisions in this Manual address the use of markings in combination with a longitudinal rumble strip. DelDOT's Design Guidance Memorandum Number 1-18: Continuous Centerline and Longitudinal Edge Line Rumble Strips provides guidance regarding the design and placement of rumble strips along state-maintained roadways.

Option:

03 An edge line or center line may be located over a longitudinal rumble strip to create a rumble stripe.

Standard:

04 The color of an edge line or center line associated with a longitudinal rumble stripe shall be in accordance with Section 3A.05.

05 An edge line shall not be used in addition to a rumble stripe that is located along a shoulder.

Support:

06 Figure 3J-1 illustrates markings used with or near longitudinal rumble strips.