Posts Tagged ‘transportation research board’

TRB Releases HMMH-Authored ACRP Document 19: Integrated Noise Model Accuracy for General Aviation Aircraft

Wednesday, October 29th, 2014

by Nicholas P. Miller

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The Transportation Research Board (TRB) recently released ACRP Document 19: Integrated Noise Model Accuracy for General Aviation Aircraft, the result of research conducted by a team of consultants led by HMMH. HMMH was retained to conduct this research project to determine the cause and recommend changes to the Integrated Noise Model (INM), which currently incorrectly computes the noise created by many of the General Aviation Jets. The study compared INM produced sound exposure levels and climb profiles with measured sound exposure levels and radar reported climb profiles. HMMH found that the INM assumed all aircraft used maximum power for takeoff, while in practice, pilots used a “derated” thrust to preserve engine life, creating lower takeoff altitudes, and generally lower levels than the INM computed. HMMH developed a method that would use the INM modeling in a realistic manner, duplicating the procedures used by pilots and are in communication with FAA to assist if possible in correcting the INM modeling. In the future, modeling would be more accurate, noise exposures realistic, and better decisions will be made about land use and aircraft noise around airports where General Aviation jets operate.

ACRP Report Released on Defining and Measuring Aircraft Delay and Airport Capacity Thresholds

Wednesday, March 12th, 2014

ACRP104coverLast week, the Transportation Research Board’s Airport Cooperative Research Program (ACRP) released Report 104: Defining and Measuring Aircraft Delay and Airport Capacity Thresholds. The ACRP report offers guidance to help airports understand, select, calculate, and report measures of delay and capacity. The report describes common metrics, identifies data sources, recommends metrics based on an airport’s needs, and suggests ways to potentially improve metrics.

Guidance and recommendations are provided regarding the relevance of particular delay and capacity measures by airport type, airport characteristics, and project lifecycle phase. The report suggests the most appropriate measurement tools at various points in the project development cycle, for specific items in each element, and for different types of airports. The report does recognize that it is not practical to have one threshold that can be applied to all airports.

The report includes additional metrics that would be helpful in the future, one of which is better communication of delays to the general public. The report summarizes that these communications should be easily understandable, able to be used as a common measure at any airport, and applied consistently across all airports. It was also noted that using a more positive metric, such as level of service, rather than using a term such as delay, which has a negative connotation, would better serve the public and the industry overall.

The research, led by TransSolutions of Fort Worth, TX, was conducted under ACRP Project 03-20. The other team members and primary authors of the report included Futterman Consulting of St. Petersburg, FL, Harris Miller Miller & Hanson Inc. of Herndon, VA, and Jasenka Rakas of Berkeley, CA.

Click here to view the report.

Report from TRB 2010 Annual Meeting

Wednesday, January 27th, 2010

by Mary Ellen Eagan

At long last, a report from the 2010 Annual TRB Conference.  My focus is on the workshop, committee meetings, and sessions that were sponsored or co-sponsored by the Committee on the Environmental Impacts of Aviation (AV030).  Here’s my three days at TRB, in chronological order:

Sunday’s Workshop The Costs of Cleaner: Aviation’s Emissions Inventories and Economic Consequences of Their Reduction included three presentations with very different lenses on the climate change issue:

The Committee on Environmental Impacts of Aviation (AV030) held its meeting Monday morning (yours truly presiding – please let me know if you’re interested in joining our mailing list).  In addition to discussion of committee business, there were two student paper presentations:  Analysis and Control of Airport Departure Processes to Mitigate Congestion Impacts by Ioannis Simaiakis of Massachusetts Institute of Technology, and Lung Deposition of Jet Engine Exhaust Particulate Matter by Elizabeth A. Black of Missouri University of Science and Technology.  The Sustainability Subcommittee also met on Monday, and included a third paper presentation, Mitigating Aviation Carbon Dioxide Emissions: An Analysis for Europe by Lynnette Dray of the University of Cambridge.  The Noise Subcommittee meeting (a joint subcommittee with the Committee on Transportation Noise, ADC40) included presentations by Raquel Girvin on Noise Effects Characterization and Mitigation Research and Lynn Engelman on the DOD Aviation Noise Program.  We also announced the formation of a new Water Resources Subcommittee, which will be ably led by Thomas Klin of CH2M Hill.

AV030 sponsored or co-sponsored three technical sessions:

As you can probably infer from this recitation of meetings and papers, attending TRB’s annual meeting can be a bit like drinking from a fire hose.  My advice to newcomers is pacing (those 9 pm sessions can really do you in), but I have always found the sessions to be informative and stimulating.  And I usually find that something about one (or more) of the sessions finally sinks in sometime later.  I’ll check back in then.

A Long Week

Friday, January 15th, 2010

by Mary Ellen Eagan

I’m supposed to be blogging about TRB’s Annual Meeting, and the exciting and informative workshops, committee meetings, and sessions I attended.

Instead, I find myself contemplating the situation in Haiti.  I’m thinking not just about the logistical and operational challenge of operating an airport that has been decimated, but mostly about the collapse of an entire country – one analogy I read was that it’s as if everyone in New Orleans had drowned in Katrina.  I’m also thinking about the poverty, colonialism, and neglect that are the real causes of this tragedy and struggling with what the US should (and can) do about it.

So I will return to TRB after the weekend.  In the interim, if you’re interested in contributing, please consider Partners in Health, a physician-led organization that has been on the ground in Haiti for more than 20 years.