Posts Tagged ‘obsi’

Founder’s Award

Monday, October 28th, 2013

by Nick Miller

At last week’s HMMH Annual Stockholder Meeting, the Founders of HMMH presented their award for excellence “In recognition of outstanding performance on a project that was uniquely challenging, technically innovative, and resulted in proven client satisfaction.”  The award was given to the project “On-Board Sound Intensity Measurements to Evaluate the Noise Reduction of Pavement Grinding, I-195, Providence RI.”  The Project Manager was J. Eric Cox, Principal in Charge was Christopher W. Menge, and the team included James E. Ferguson III, and Ryan Cranfill.

From left: Carl Hanson, Chris Menge, J. Eric Cox, Nick Miller

From left: Carl Hanson, Chris Menge, J. Eric Cox, Nick Miller

 

 

 

 

 

 

 

 

 

 

 

The purpose of the project was to prove that adequate sound reduction of I-195 road noise had been achieved by diamond grinding of the concrete bridge deck, mainline roadway, and on/off/interchange ramp surfaces. Grinding operations were conducted to reduce noise generated by traffic traveling over transverse tining. The “OBSI” measurements had to be made on 19 ramps and roadway sections, in the wee morning hours when little other traffic was using the roadways.  Client David Freeman of Maguire Group, Providence, RI said that “it worked out really well and the results [of the measurements] were used to justify a bonus to the contractor.”

More information on OBSI can  be found on HMMH’s website: http://www.hmmh.com/on-board-sound-intensity.html.

Interest in Tire Pavement Noise Keeps Rolling at TRB Annual Meeting

Wednesday, February 16th, 2011

by Doug Barrett

The Transportation Research Board (TRB) held its 90th Annual Meeting in Washington DC from January 23-37. Although I’ve attended many of these meetings, the size and breadth of the annual meeting always astonish me. This year’s meeting set a new record (over 10,900) and, as usual, there were workshops and sessions covering everything under the sun related to transportation.

As the primary source of traffic noise, tire-pavement noise continues to be a hot topic in the highway noise world. Although the ADC40 Committee on Transportation-Related Noise and Vibration is just one small part of the annual meeting, in recent years the Committee has broadened its scope by co-sponsoring sessions with other committees. This year, ADC40 co-sponsored three workshops or sessions on tire-pavement topics. Sunday morning’s workshop titled “Implementing Noise-Reducing Pavement Research, an International Perspective: Making Pavement Research Results Work in Practice” was followed by Monday’s session on the “Effect of Asphalt Mixture Composition on Friction and Noise,” and Wednesday’s “Tire-Pavement Noise” session. Co-sponsors of these workshops/sessions included the Committees on Surface Properties-Vehicle Interaction (AFD90), Characteristics of Asphalt-Aggregate Combinations to Meet Surface Requirements (AFK40), and Pavement Maintenance (AHD20).

One topic covered during these sessions was the use of On-Board Sound Intensity (OBSI) measurements. OBSI has gained widespread acceptance throughout the U.S. as a standardized approach for quantifying tire-pavement noise. Recently, HMMH conducted OBSI measurements at locations throughout Virginia, on behalf of the Virginia Department of Transportation (VDOT). The VDOT measurements are part of an ongoing program to document the long-term benefits of pavement overlays. OBSI measurements, however, not only can document the noise reduction benefits of quieter pavements, but also can help to identify louder pavements. As the noise program manager for another DOT said, his state’s ongoing OBSI test program is not about finding the quietest pavements – it’s about identifying the loudest ones!

OBSI Measurement

OBSI Measurement