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Publication Number:  FHWA-HRT-15-048    Date:  June 2015
Publication Number: FHWA-HRT-15-048
Date: June 2015

 

Safety Evaluation of Centerline Plus Shoulder Rumble Strips

Appendix: Additional Installation Details from States

The following appendix presents additional details provided by the three participating States regarding the installation of the subject strategies in their State.

Details of the Kentucky Sites

Kentucky provided the rumble strip specifications seen in table 23:

Table 23. Installation details for Kentucky.

Dimensions Centerline Rumble Strips Shoulder Rumble Strips
Width 7 inches minimum
7½ inches maximum
7 inches ± ½ inch
Length 12 inches 16 inches
Depth ½ inch minimum
5/8 inch maximum
½ ± 1/8
Spacing 24 inches 12 inches ± 1 inch
Lateral Placement Center of roadway, perpendicular to centerline pavement markings Place 1 ft out from the mainline pavement

Kentucky was also asked to provide some additional insight on their experience with the strategy. Their responses to several topics are presented below. The following responses are provided from the perspective of the State and are phrased informally:

Details of the Missouri Installations

Missouri provided the rumble strip specifications seen in table 24:

Table 24. Installation details for Missouri.

Dimensions
Centerline Rumble Strips (Typical Drawing Detail #1)
Shoulder Rumble Strips
Width 7 inches ± ½ inch 7 inches ± ½ inch
Length 12 inches 12 inches
Depth 7/16 inch ± 1/16 inch 7/16 inch ± 1/16 inch
Spacing 12 inches and 24 inches (alternating pattern) 12 inches
Lateral Placement Centered on the centerline of the roadway Placed on the outside edge of the edge line

Missouri was also asked to provide some additional insight on their experience with the strategy. Their responses to several topics are presented below. As with Kentucky, the following responses are provided from the perspective of the State and are phrased informally:

Details of the Pennsylvania Installations

Pennsylvania provided the rumble strip specifications seen in table 25 and table 26:

Table 25. Installation details for Pennsylvania.

Dimensions
Centerline Rumble Strips (Typical Drawing Detail #1)
Centerline Rumble Strips (Typical Drawing Detail #2)
Edge Line Rumble Strips
Width 7 inches ± ½ inch 7 inches ± ½ inch 5 inches ± ½ inch
Length 16 inches 14-18 inches 6 inches
Depth ½ inch ± 1/16 inch ½ inch ± 1/16 inch ½ inch ± 1/16 inch
Spacing 2 ft and 4 ft (alternating pattern) 2 ft 7 inches
Lateral Placement Placed on both sides of the centerline, from inner edge of double yellow line marking and extending 16 inches into lane Center of roadway, perpendicular to centerline pavement markings Centered over 4‑inch edge line and edge line placed 4-6 ft from outside edge of shoulder

Table 26. Installation details for bicycle tolerable rumble strips for Pennsylvania.

Dimensions
Bicycle Tolerable Shoulder Rumble Strip (55 mi/h or more)
Bicycle Tolerable Shoulder Rumble Strip (less than 55 mi/h)
Width 5 inches ± ½ inch 5 inches ± ½ inch
Length 16 inches 16 inches
Depth 3/8 inch ± 1/16 inch 3/8 inch ± 1/16 inch
Spacing 7 inches 6 inches
Lateral Placement 6 inches from edge of travel lane and 4 ft minimum from outside edge of shoulder 6 inches from edge of travel lane and 4 ft minimum from outside edge of shoulder

Pennsylvania was also asked to provide some additional insight on their experience with the strategy. Their responses to several topics are presented below. As with Kentucky and Missouri, the following responses are provided from the perspective of the State and are phrased informally:

 

 

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