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Tools for Expedited Regional Transportation Noise Modeling

Tools for Expedited Regional Transportation Noise Modeling. Jim Cowan and Ken Kaliski Resource Systems Group, Inc. White River Junction, VT. The Noise Map. The Ingredients. Road traffic volumes and speeds Rail traffic volumes and speeds Roadway and rail geometry Aerial Photography

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Tools for Expedited Regional Transportation Noise Modeling

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  1. Tools for Expedited Regional Transportation Noise Modeling Jim Cowan and Ken Kaliski Resource Systems Group, Inc. White River Junction, VT

  2. The Noise Map

  3. The Ingredients • Road traffic volumes and speeds • Rail traffic volumes and speeds • Roadway and rail geometry • Aerial Photography • Topography • Residential database (E-911)

  4. Road Traffic and Speeds • Volumes, Speeds, and Road Geometry from the 2005 PM Peak Hour MPO TransCAD Travel Demand Model • Adjusted to AADT using 10% K-Factor • Truck Percentage and Time of Day Distribution using Cadna/A Defaults for Federal Highways (German Standards) • Cadna to include TNM beginning Fall 2006

  5. Rail Traffic and Speeds • Data supplied from rail authorities (NECR and VTR) • Volumes • Speeds • Number of cars • Number of locomotives • Schedules

  6. Aerial Photography • Source • USGS/Microsoft TerraServer • Vermont Mapping Program • Use • Visualization • Identification of Building Densities

  7. Terrain USGS Digital Elevation Models Contoured using Surfer

  8. Other Data • Town Boundaries • Roadways/Rail Lines • Residence Locations • Built-up Areas

  9. The Result

  10. Calibration Results • 17 locations monitored • Short and long term • Regression shows good fit • Mean error +2.1 dB • Standard deviation 4.3 dB • 50th percentile error +1.1 dB • Some significant outliers

  11. Household Level Detail

  12. GIS Analysis

  13. Implications • 20% of households live with daytime levels exceeding 55 dBA • This is the WHO criterion for “serious annoyance” • This compares with 40% in Europe • 45% of households live with nighttime levels exceeding 45 dBA • This is the WHO sleep disturbance criterion • Sleep disturbance does not necessarily mean waking up

  14. Impacts of Noise • Interference with communication • Interference with learning • Social behavior • Annoyance • Sleep disturbance • Attendance at TRB meetings

  15. Why Do Noise Mapping? • Establish basis for noise management strategies • Assess land-use planning success • Identify compatible land uses • Analyze impacts of new sources • Determine extent of noise exposure • Evaluate high risk groups and areas • Assess effectiveness of noise policies • Because we can

  16. How Can a Municipality Use the Noise Map? • Baseline level for future area-wide planning • Quick assessment of land-use forecast impacts and changes to transportation network • Development of community noise standards • Supplement to community noise surveys • Basis for development planning • Test policies (traffic calming, etc.) • Support zoning • Help developers plan better residential development • Raise awareness of noise issues

  17. Questions?

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