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Pages 139-166

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From page 139...
... B-1 Roger Wayson and John McDonald, Wyle Jeff Snyder and John Zimmerman, Northeast Wind Eddie Duncan, Ken Kaliski, and Ryan Haac, RSG Bill Bowlby and Darlene Reiter, Bowlby & Associates Erik Salomons, TNO Aaron Hastings, Volpe Center A P P E N D I X B Data Collection
From page 140...
... B-2 Table of Contents B-3 Chapter B-1 Data Collection B-23 Chapter B-2 Meteorology B-28 Chapter B-3 Summary
From page 141...
... B-3 Data Collection Data collection for NCHRP Project 25–52, Meteorological Effects on Roadway Noise, was completed along I-17 in Phoenix, Arizona. This chapter provides information on the monitoring locations, monitor positions, schedule, equipment, metrics, and QA/QC procedures.
From page 142...
... B-4 How Weather Affects the Noise You Hear from Highways Figure B-1. Overall map of the monitoring area.
From page 143...
... Appendix B: Data Collection B-5 Figure B-3. Pavement surface texture; I-17.
From page 144...
... B-6 How Weather Affects the Noise You Hear from Highways Figure B-6. Map of the acoustic positions at the barrier location.
From page 145...
... Appendix B: Data Collection B-7 Figure B-7. Map of the reference acoustic position at the end of the barrier (15 meters from the centerline of the near lane)
From page 146...
... B-8 How Weather Affects the Noise You Hear from Highways Daily trips were made to each location. All equipment (acoustic and meteorological)
From page 147...
... Appendix B: Data Collection B-9 ITEM QUANTITY DESCRIPTION CONTRIBUTOR Relative Humidity Sensor 1 Moisture determination MacDonald Acoustic calibrator 2 Daily calibration of SLAs Wyle Laptop computer 1 Daily data download, setup, and storage Wyle SLA cables 13 For extension of microphones to heights Wyle Batteries (12 volt) 15 For extended sampling time Wyle Battery Charger 1 As needed Wyle Interacter Battery Charger 1 As needed Volpe WindCube V2 LiDAR System 1 Upper Air Data, Ridgeline Academy, ~1 mile east at Ridgeline Academy RNRG Systems MTP5-HE Temp Profiler 1 ~1 mile east at Ridgeline Academy Kipp & Zonen Met Tower (30 feet)
From page 148...
... B-10 How Weather Affects the Noise You Hear from Highways In addition, general equipment and supplies used on an as-needed basis include disposable batteries, zip ties, a head lamp, tape, miscellaneous cables, a multi-meter, band clamps, miscellaneous tools, locks, chains, clip boards, and general office supplies. Metrics and Position Details Acoustic data taken at a total of 16 positions included: • Time, • Leq, Lmin, Lmax (A and C weighting)
From page 149...
... Appendix B: Data Collection B-11 were used at the key 120-meter position for both the precision u-v-w anemometers and the aspirated thermometers. These were placed at 1.8 meters (6 feet)
From page 150...
... B-12 How Weather Affects the Noise You Hear from Highways Figure B-11. Upper air measurement station located atop Ridgeline Academy, approximately 0.8 miles from the non-barrier site.
From page 151...
... Appendix B: Data Collection B-13 Figure B-12. Orthophoto and elevation profile between Ridgeline Academy and I-17 Non-Barrier Location (Google Earth)
From page 152...
... Figure B-13. Orthophoto and elevation profile between Ridgeline Academy and I-17 Barrier Location (Google Earth)
From page 153...
... Appendix B: Data Collection B-15 Acoustic Position Descriptions (Non-Barrier, Primary Location) In determining the positions, a 500-foot tape was used to measure distances out to 240 meters to be as accurate as possible in the rough terrain.
From page 154...
... B-16 How Weather Affects the Noise You Hear from Highways 60-Meter: This position, back in alignment with the other positions was outside the right-ofway, behind a barbed wire fence, in the State controlled land, and 60 meters from the centerline of the near travel lane. The microphone was 1.5 meters (5 feet)
From page 155...
... Appendix B: Data Collection B-17 Figure B-17. 60-meter position looking to the north with I-17 shown on the right.
From page 156...
... B-18 How Weather Affects the Noise You Hear from Highways Figure B-20. 480-meter position looking east toward I-17.
From page 157...
... Appendix B: Data Collection B-19 Acoustic Position Descriptions (Barrier Location) The location was not as was described in the Site Selection Report the panel had reviewed.
From page 158...
... B-20 How Weather Affects the Noise You Hear from Highways sure there was not an erratic occurrence, and care in data storage in multiple locations to avoid any loss due to memory problems. Field notes were kept on events such as interaction with the monitors and noise events not related to I-17.
From page 159...
... Appendix B: Data Collection B-21 Figure B-24. Reference position at barrier location (insert shows security measure used)
From page 160...
... B-22 How Weather Affects the Noise You Hear from Highways For the acoustic data, the algorithms, written in R, use logic such as: • From notes, it is known when individuals were at the positions and this data is compromised and removed from QA/QC data. • The reference locations are the 15-meter position at both locations and use REMEL position criteria.
From page 161...
... B-23 Abnormally warm conditions were in place over the southwest for the majority of the data collection campaign between February 22, 2016, and March 8, 2016. With atypically warm daytime high temperatures and the long February and March nights supporting ample radiational cooling at the surface, these conditions were ideal for the formation of strong inversions.
From page 162...
... B-24 How Weather Affects the Noise You Hear from Highways Source: National Oceanic and Atmospheric Administration Figure B-25. National Weather Map illustrating the synoptic conditions over various dates of the data collection campaign.
From page 163...
... Appendix B: Data Collection B-25 Figure B-26. Observed and climatic daily temperatures at Phoenix Sky Harbor International Airport.
From page 164...
... B-26 How Weather Affects the Noise You Hear from Highways Figure B-27. Directional frequency distribution at 40 meters over the measurement campaign as recorded by the Wind Cube v2 LiDAR system.
From page 165...
... Appendix B: Data Collection B-27 Temperature (C)
From page 166...
... B-28 The data collection effort was successful. Careful location reviews during planning led to conditions (acoustic and meteorological)

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