T.F. Green Airport Improvement Program - FEIS Chapters - PVD

T.F. Green Airport Improvement ProgramEnvironmental Impact Statement and Final Section 4(f) EvaluationTable 5-27Alternative B4: 2025 Summary of Traffic Noise Impacts by NeighborhoodTotal Number of Housing Units 1Loudest-hour Leq in dBAExposed to Noise ImpactChangeRelative toBaseline No-Action Alt. B4 Baseline Baseline No-Action Alt. B4Roadway Neighborhood 2004 2025 2025 (dB) 2004 2 2025 2 2025South side of Main Ave Greenwood: Post to Gertrude 3 48 to 73 48 to 74 51 to 74 0 to 8 16 18 15North side of Main Ave Greenwood: Post to Gertrude 3 49 to 73 49 to 74 48 to 72 -9 to 1 13 13 10North side of Main Ave Greenwood: Industrial to Inman 4 47 to 69 48 to 70 48 to 70 -5 to 1 9 9 3South side of Main Ave Greenwood: Gladys Ct to Buttonwoods 4 49 to 71 49 to 71 55 to 71 -4 to 17 15 15 20South side of Main Ave Greenwood: Graymore to Walnut Glen 4 43 to 52 43 to 53 49 to 70 7 to 18 0 0 5West side of Post Road Hillsgrove: Elkland to Pell 5 49 to 70 50 to 70 50 to 70 -3 to 2 4 5 5East side of Post Road Lincoln Park: Tennessee Ave. 5 50 to 56 51 to 56 52 to 59 1 to 3 0 0 0Total - - - - 57 60 58Source: HMMH, 2009.1 These numbers of housing units take into account the property acquisitions that are required for the roadway improvements and acquisitions for the newly createdRPZ as well as Current Part 150 VLAP and Future Build VLAPs.2 For baseline conditions and the No-Action Alternative, the number of housing units exposed to “impact” represents those residences for which baseline trafficnoise levels approach or exceed the FHWA NAC for Activity Category B for the loudest hour of the day. For the Alternative B4 case, the number of impactedhousing units is due to both traffic noise levels that approach or exceed the relevant FHWA NAC and that cause a substantial increase over baseline levels.3 See Figure A.4-23 in DEIS Noise Supporting Attachment.A.11, Supporting Report Graphics.4 See Figure A.4-24 in DEIS Noise Supporting Attachment.A.11, Supporting Report Graphics.5 See Figure A.4-22 in DEIS Noise Supporting Attachment A.11, Supporting Report Graphics.DEIS Noise Supporting Attachment A.4, Vehicular Traffic Noise Technical Report, provides a detailed assessmentof Improvement Program-related traffic noise, including detailed tables of computed traffic noise levels for eachalternative. Traffic DNLs in 2020 would range from 49.4 to 74.8 dB at affected residences throughout the StudyArea with Alternative B4. In 2025, traffic DNLs are expected to increase by less than 1 dB over 2020 levels due toprojected growth in area traffic volumes. Overall, the same number of housing units would be impacted bytraffic noise in 2020 when compared to the No-Action Alternative.Table 5-27 summarizes the computed traffic noise levels in each of the neighborhoods that would be affected bytraffic noise due to Alternative B4 in 2025. As shown in the table, the projected traffic noise levels wouldincrease slightly with respect to 2020, but no additional housing units would be exposed to traffic noise impactby 2025 with Alternative B4.Composite Noise – 2020 and 2025The DNL values at these sites indicate that aircraft flight operations would dominate the noise environment for2020 and 2025. In 2020 and 2025, no sites would experience a significant noise increase (increase of at leastDNL 1.5 dB at or above DNL 65 dB). Tables F.3-7 and F.3-8 in Appendix F.3, Composite Noise, present a summaryof the composite noise exposure (DNL) for Alternative B4 in 2020 and 2025, respectively from all programrelatedsources of noise.Chapter 5 - Environmental Consequences 5-37 July 2011\\mawatr\ev\09228.00\reports\FEIS_Final_July_2011\PVD_CH05_Environmental_Cons_JUL_2011.doc