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Oakland International Airport Consulting Services

VIEWS: 5 PAGES: 14

									NextGen
for Noise Mitigation
Paul Dunholter, P.E.
BridgeNet International
October 10, 2007
Presentation Outline
AAAE Noise Mitigation Symposium – San Diego   October 10, 2007   2




     What we do Today
     How will NextGen for ATC Alter Noise

     Options for NextGen in Noise
      Mitigation
     Summary
Evolution of DNL Contours
AAAE Noise Mitigation Symposium – San Diego                  October 10, 2007   3



       “First generation” DNL Noise Contours
            Contours generated in late 1970’s – early 1980’s
            Fewer operations than today; contour influenced by loud
             Stage 2 aircraft
       “Second generation” DNL Noise Contours
            Contours generated 1990’s – present
            Increase in operations; contour influenced by number of
             operations and small amount of Stage 2 activity
            Source noise greatly reduced = smaller contour = fewer
             homes eligible
       Where do we go from here?
Evolution of Mitigation
AAAE Noise Mitigation Symposium – San Diego                 October 10, 2007   4



     Prior to 1990 Airports has Ability to
      Propose Airport Specific Mitigation
     Post 1990 ANCA Limited Local Actions
            Successes
               • Substantial Home Insulation Completed to 65 DNL
               • Removal of the Loudest Aircraft from Fleet
               • Reduction in overall DNL
            Limitations
               • Airport Development did not Match Demand
               • Community Opposition Still limits Growth
NextGen and Noise
AAAE Noise Mitigation Symposium – San Diego            October 10, 2007   5



     Noise is NOT Going Away
     Substantial Growth in Operations
            Aircraft with Quieter but Similar Noise
             Characteristics
       Reduced Separation Standards
            Less time between flights
       More Precisely Flown Paths
            Concentrated Noise
ADS-B Implementation
AAAE Noise Mitigation Symposium – San Diego   October 10, 2007   6
Louisville ADS-B Example
AAAE Noise Mitigation Symposium – San Diego   October 10, 2007   7
Noise NextGen Options
AAAE Noise Mitigation Symposium – San Diego   October 10, 2007   8




     Do Nothing – keep using 65 DNL
     Use DNL at a lower value

     Use Supplemental metric

     Tie Mitigation to Capacity Growth
Noise Metric Argument
AAAE Noise Mitigation Symposium – San Diego   October 10, 2007   9



       Approved Metrics
          DNL
          CNEL

       Alternative Metrics
          Number Above
          Single Event Noise Level
          Time Above
          School Hours
          Low frequency
DNL Gets No Respect
AAAE Noise Mitigation Symposium – San Diego         October 10, 2007   10




       Why is DNL the wrong metric?
            Does not measure what you hear
               • AKA – Single Event Noise Level
          Impossible to Explain
          Averages Noise

          More Sensitive to high noise events then number
           of events
          Single Number rating scale can never account for
           all situations
DNL gets no respect
AAAE Noise Mitigation Symposium – San Diego            October 10, 2007   11




     Why             is DNL the right metric?
          Is it worth it to change it????
          Anything better????

          Is arguing over noise metrics the right battle to
           fight????
          Flexibility to use lower metric (e.g., 60 DNL)
Can Supplemental Metrics Solve the
Issue?
AAAE Noise Mitigation Symposium – San Diego   October 10, 2007   12




       Are supplemental metrics the answer?
          Number of Events Above
          Time Above

          Single event

          Heath Effects

          School Hours

          Low Frequency

       Is it the metric or the noise threshold?
Tie Mitigation to Capacity Growth
AAAE Noise Mitigation Symposium – San Diego   October 10, 2007   13




     Allow for Local Control
     Create Financing Options for
      Mitigation
     Funding for mitigation beyond 65 DNL
      when Capacity Enhancement occurs
     Stick to DNL
AAAE Noise Mitigation Symposium – San Diego              October 10, 2007   14




                                              Contact:


                           Paul Dunholter
                       BridgeNet International
                      phd@airportnetwork.com
                      714-540-3120 extension 24

								
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