Chapter 3K. Rumble Strip Markings¶
§3K.01 Longitudinal Rumble Strip Markings¶
Support
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. 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. Figure 3K-1 illustrates markings used with or near longitudinal rumble strips.
03. Section 6M.06 contains information related to longitudinal rumble strips.
Option
04. An edge line or center line may be located over a longitudinal rumble strip to create a rumble stripe.
Standard
05. The color of an edge line or center line associated with a longitudinal rumble stripe shall be in accordance with Section 3A.03.
06. An edge line shall not be used in addition to a rumble stripe that is located along a shoulder.
§3K.02 Transverse Rumble Strip Markings¶
Support
01. Transverse rumble strips consist of intermittent narrow, transverse areas of rough-textured or slightly raised or depressed road surface that extend across the travel lanes to alert drivers to unusual vehicular traffic conditions. Through noise and vibration, they attract the attention of road users to features such as unexpected changes in alignment and conditions requiring a reduction in speed or a stop.
02. This Manual contains no provisions regarding the design and placement of transverse rumble strips that approximate the color of the pavement. The provisions in this Manual address the use of markings in combination with a transverse rumble strip.
03. Section 6M.06 contains information related to transverse rumble strips.
Standard
04. Except as otherwise provided in Section 6M.06 for TTC zones, if the color of a transverse rumble strip used within a travel lane is not the color of the pavement, the color of the transverse rumble strip shall be either black or white.
Guidance
05. White transverse rumble strip markings used in a travel lane should not be placed in locations where they could be confused with other transverse markings such as stop lines or crosswalks.
