Agenda - Council - 09/24/2024 - Laserfiche WebLink

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Pearson Place 2nd Addition Traffic Noise Assessment 2.0 TRAFFIC NOISE MODEL AND PREDICTIONS 2.1. Traffic Noise Model The MinnNoise traffic noise model has been used to predict noise levels associated with vehicle traffic. The traffic noise model geometry with assumed noise receptor sites and a possible berm/wall combination is shown in Figure 2.1. The footprint of a six-foot wall on a six-foot berm would occupy the side -street setback. Hourly traffic volumes on Highway 10 were based on data from ATR (Automatic Traffic Recorder) 352 which is located is only 3300 feet to the west of the project on Highway 10. Since the most recent data at this station are from the year 2019 because of issues with the recorder, the 2019 volumes have been adjusted to 2023 data using growth rates at ATR 365 located to the east on Highway 65, approximately the same distance from Minneapolis as ATR 352. The assumed vehicle mix by direction was based on similar traffic noise studies in the Twin Cities Metropolitan Area - 95% automobiles, 3 % medium trucks and 2% heavy trucks. A traffic speed of 65 mph was used in this assessment. Assumed vehicle mix and hourly volumes are shown in Table 2.1. "MT" are medium (two -axle trucks) while "HT" are heavy (multi -axle trucks). Table 2.1 Assumed Hourly Volume and Vehicle Mix EB AM PM Auto 1545 1362 MT 49 43 HT 33 29 TOTAL 1626 1434 WB AM PM Auto 407 2169 MT 13 69 HT 9 46 TOTAL 428 2284 The traffic noise model geometry showing the noise receptor sites relative to the east and west roadways is shown in Figure 2.2. Also shown on the figure is the assumed highway noise barrier and an assumed effective barrier presented by the homes themselves shielding the east and west facades by traffic noise associated with the long lengths of road to either side of the property. David Braslau Associates, Inc. Page 4