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Author Topic: ArDOT Test of Mumble Strips  (Read 281 times)

TheArkansasRoadgeek

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ArDOT Test of Mumble Strips
« on: October 12, 2018, 08:21:11 AM »

ArDOT Assesses the Possibilities
Is there a future for mumble strips on
Arkansas’ highways? ArDOT is using
MnDOT studies as a baseline to build upon
our evaluation.
“The Department has installed test
mumble strips on a number of highways
in order to study their effectiveness,”
stated ArDOT Engineer John Lasley with
the Transportation Planning and Policy
Division.

Roadways with mumble strips include:

State Highway 10 in Yell County, State
Highway 35 in Chicot County, U.S. Highway
65 in Newton and Searcy Counties,
U.S. Highway 67 in Saline County, State
Highway 69 in Izard County, State Highway
139 in Clay County and State Highway 140
in Mississippi County.
The objective is to determine if mumble
strips produce adequate interior sound to
capture the attention of drowsy drivers
in the same manner that existing rumble
strips do.

Measuring the Difference:
Did You Hear That?
The test mumble strips ArDOT is
considering vary in size.

“The primary design for shoulders
with widths greater than 5 feet, 6-inches
will be 12 inches wide, ˝-inch deep with
a 14-inch wavelength,” Lasley explained.
 This design is still under review.
“For narrow shoulders (less than
5 feet, 6-inches) the design will be 8
inches wide, with the same depth and
wavelength.”

Centerline mumble strips will consist
of two 8-inch wide strips offset from the
center joint of the asphalt by 2 inches on
either side.
“Our product evaluation is looking at
the sound characteristics of these strips,”
says Bentley Reynolds, a Research
Assistant in the System Information &
Research Division.

“We are taking decibel and frequency
measurements of current rumble strips
already installed on our highway system.
Our crews are then coming back through
and placing mumble strips where there
were rumble strips or nothing at all. We
want to determine if the mumble strips
produce a comparable level of vibration
and sound within the test vehicle that
will be enough to alert a driver that they
are leaving the roadway, while reducing
external sound to the environment.”
Testing sites were selected based on
current construction schedules. Most of
the sites currently have rumble strips
and are slated to receive centerline or
shoulder mumble strips in the future.

Arkansas Highways Magazine, pages 14-15 ~ 10/12/2018
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capt.ron

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Re: ArDOT Test of Mumble Strips
« Reply #1 on: October 12, 2018, 11:27:52 AM »

A lot of the highways in White County have them. AR 13 from AR 36 to 16 has them. US 67-167 freeway has them on the shoulders. AR 36 has them just west of the 5 lane section.
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roadman65

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Re: ArDOT Test of Mumble Strips
« Reply #2 on: October 12, 2018, 11:30:58 AM »

That's old news if you have been to PA.  Years ago entering Hershey from PA 39 EB you had them approaching the  Hersheypark Drive intersection.

Then PTC used it on former I-276 (now I-95) at the now defunct Exit 30 Plaza.  Coming off the bridge from NJ you got a big sound as you approached the plaza.

Other places PennDOT or the PTC used them quite frequently.
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MikieTimT

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Re: ArDOT Test of Mumble Strips
« Reply #3 on: October 12, 2018, 11:47:15 AM »

I'm sure that the folks living next to the curvy roads around here with rumble strips will rejoice.  Especially those areas where people take the inside shoulder of a fairly sharp right-hand corner.
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kphoger

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Re: ArDOT Test of Mumble Strips
« Reply #4 on: October 12, 2018, 01:41:44 PM »

That's old news if you have been to PA.  Years ago entering Hershey from PA 39 EB you had them approaching the  Hersheypark Drive intersection.

Then PTC used it on former I-276 (now I-95) at the now defunct Exit 30 Plaza.  Coming off the bridge from NJ you got a big sound as you approached the plaza.

Other places PennDOT or the PTC used them quite frequently.

mumble strips or rumble strips?
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jeffandnicole

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Re: ArDOT Test of Mumble Strips
« Reply #5 on: October 12, 2018, 01:48:44 PM »

That's old news if you have been to PA.  Years ago entering Hershey from PA 39 EB you had them approaching the  Hersheypark Drive intersection.

Then PTC used it on former I-276 (now I-95) at the now defunct Exit 30 Plaza.  Coming off the bridge from NJ you got a big sound as you approached the plaza.

Other places PennDOT or the PTC used them quite frequently.

It sounds like you're talking about rumble strips crossing the road, warning motorists of an upcoming hazard.   

These are in reference to shoulder or center-line rumblestrips, should you cross over the line.
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kphoger

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Re: ArDOT Test of Mumble Strips
« Reply #6 on: October 12, 2018, 01:57:53 PM »

That's old news if you have been to PA.  Years ago entering Hershey from PA 39 EB you had them approaching the  Hersheypark Drive intersection.

Then PTC used it on former I-276 (now I-95) at the now defunct Exit 30 Plaza.  Coming off the bridge from NJ you got a big sound as you approached the plaza.

Other places PennDOT or the PTC used them quite frequently.

It sounds like you're talking about rumble strips crossing the road, warning motorists of an upcoming hazard.   

These are in reference to shoulder or center-line rumblestrips, should you cross over the line.

It's also about mumble strips, not rumble strips.  Different cross-section, different sound qualities.
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