Overview of the ADOT Quiet Overview of the ADOT Quiet Pavement - - PDF document

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Overview of the ADOT Quiet Overview of the ADOT Quiet Pavement - - PDF document

Oct 06, 2022 277 likes •385 views

Overview of the ADOT Quiet Overview of the ADOT Quiet Pavement Program Pavement Program TRB Summer Conference 2005 Seattle Washington Todays Objective Todays Objective Introduce ADOTs Quiet Pavement Pilot Program Introduce

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Overview of the ADOT Quiet Pavement Program Overview of the ADOT Quiet Pavement Program

TRB Summer Conference 2005 Seattle Washington

Today’s Objective Today’s Objective

  • Introduce ADOT’s Quiet Pavement Pilot Program

for site 2 receivers

  • Outline the data collection procedures
  • Display reduction results
  • Introduce ADOT’s Quiet Pavement Pilot Program

for site 2 receivers

  • Outline the data collection procedures
  • Display reduction results
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Project Objectives Project Objectives

  • Ascertain effectiveness of ARFC as noise mitigation

strategy over time

  • Develop methodology for project
  • Establish protocol for data collection
  • Select sites along 18 segments
  • Conduct pre- and post-overlay monitoring
  • Determine reduction in sound level
  • Compile findings in report (in progress)
  • Ascertain effectiveness of ARFC as noise mitigation

strategy over time

  • Develop methodology for project
  • Establish protocol for data collection
  • Select sites along 18 segments
  • Conduct pre- and post-overlay monitoring
  • Determine reduction in sound level
  • Compile findings in report (in progress)

Project Area Project Area

  • Throughout the Phoenix Metropolitan area within

Maricopa County

  • Covers approximately 115 miles of freeway
  • Spans across several cities (Phoenix, Scottsdale,

Glendale, Mesa, Tempe, Chandler)

  • Throughout the Phoenix Metropolitan area within

Maricopa County

  • Covers approximately 115 miles of freeway
  • Spans across several cities (Phoenix, Scottsdale,

Glendale, Mesa, Tempe, Chandler)

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Regional Freeway System Regional Freeway System Methodology Methodology

  • “Can rubberized asphalt provide a 4dB reduction

in neighborhoods?” If so…

  • “Can this reduction be sustained over a period of

time?” And if so…

  • For how long?
  • “Can rubberized asphalt provide a 4dB reduction

in neighborhoods?” If so…

  • “Can this reduction be sustained over a period of

time?” And if so…

  • For how long?
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Site Selection Site Selection

  • Representative of residential land uses
  • Availability of repeat monitoring
  • Varying conditions:

With and without intervening sound walls Elevated and depressed segments Public facilities (parks, recreation areas)

  • When possible residential property was selected
  • Representative of residential land uses
  • Availability of repeat monitoring
  • Varying conditions:

With and without intervening sound walls Elevated and depressed segments Public facilities (parks, recreation areas)

  • When possible residential property was selected

Site 2 Receiver Locations Site 2 Receiver Locations

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Monitoring Monitoring

  • 24-hour readings (1 per segment)
  • Used loudest hour(s)
  • 3 consecutive 20-minute readings at each site
  • Weather conditions monitored
  • Traffic video for counts and speed
  • 24-hour readings (1 per segment)
  • Used loudest hour(s)
  • 3 consecutive 20-minute readings at each site
  • Weather conditions monitored
  • Traffic video for counts and speed

24 Hour Reading in DNA Software 24 Hour Reading in DNA Software

5:00:AM 6:00:AM 7:00:AM 8:00:AM 9:00:AM 10:00:AM 11:00:AM 12:00:PM 1:00:PM 2:00:PM 3:00:PM 4:00:PM 5:00:PM 6:00:PM 7:00:PM 8:00:PM 9:00:PM 10:00:PM 11:00:PM 12:00:AM 1:00:AM 2:00:AM 3:00:AM 4:00:AM 5:00:AM time 40 50 60 70 80 decibel

ARFC Overlay Pilot Program

24-Hour Noise Monitoring September 23, 2003 to September 24, 2003 L101 Pima Freeway - At Cholla Street SPL Running Leq Sliding Leq

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1 Hour Reading in DNA Software 1 Hour Reading in DNA Software

Traffic Counts Traffic Counts

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67.8 Pre-Overlay Leq 60.5 60.8 Adjusted reduction Post- Overlay Leq

I10-H-5

64.9 Pre-Overlay Leq 58.8 59.1 Adjusted reduction Post- Overlay Leq

L101-A-3

Data Analysis/Reduction Data Analysis/Reduction

  • Vehicle equivalents used to compare pre and post

readings

  • Vehicle equivalents used to compare pre and post

readings

** Based on FHWA Traffic Noise Model (TNM) Reference Energy Mean Emission Levels and vehicle definitions in FHWA-PD-96-008, DOT-VNTSC-FHWA-96-2. 1 3.2 8.3 113 (70) 1 3.5 8.9 105 (65) 1 3.7 9.6 97 (60) 1 4.1 10.4 88.5 (55) 1 4.5 11.5 80 (50) 1 5.0 12.9 72 (45) 1 5.8 15.1 64 (40) 1 7.1 19.1 56 (35) 1 Automobile = 1 medium truck = 1 Heavy Truck = Speed km/h (mph) NUMBER OF EQUIVALENT VEHICLES Equivalent Vehicles Based on TNM REMELs**

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Vehicle Equivalents Calculation Sheet Vehicle Equivalents Calculation Sheet

  • Average reduction exceeds 4dB
  • Public reaction is favorable toward rubberized

asphalt in the Phoenix area

  • Average reduction exceeds 4dB
  • Public reaction is favorable toward rubberized

asphalt in the Phoenix area

Findings to Date Findings to Date

5.3 Overall 5.6 Phase 2 4.9 Phase 1 Reduction to Date (in decibels)

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Questions and Answers Questions and Answers