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TRANSCRIPT
ENV 125 9/12/2019
ENV125Basics of Traffic Noise and TxDOT’s Traffic Noise Policy
09/12/2019
ENV 125 9/12/2019
Agenda
Introduction and Overview
– Traffic Noise Toolkit
Fundamentals of Noise
Traffic Noise Analysis Process
– Regulations and Guidance
– Overview
– Noise Impact and Abatement Criteria
– Noise Workshops
– Documentation
2
ENV 125 9/12/2019
Traffic Noise Toolkit
All current noise policy, guidance, and information in one place!
http://www.txdot.gov/inside-txdot/division/environmental/compliance-toolkits/traffic-noise.html
2011 Guidelines
Federal Rule: 23 CFR 772
New 2019 Traffic Noise Policy Effective Date: 12/31/2019
Document Template Text
Letters to Local Officials Template
Noise Barrier Brochures
3
ENV 125 9/12/2019
Traffic Noise Guidance and Policy
4
2011:
2019:
Streamlined - Requirements OnlyAddresses requirements outlined in
23 CFR 772 that must be specified bythe state DOT and approved by FHWA
User-friendlyGuidance, how-to instructions & examples
Can be updated without formal FHWA approval
On ToolkitFHWA Approved on
December 31, 2018
Coming Soon toNoise Toolkit
ENV 125 9/12/2019
Sound/NoiseSound/Noise
Noise AnalysesNoise Analyses
Sound/NoiseSound/NoiseOVERVIEW
OVERVIEW
ENV 125 9/12/2019
Highway Traffic SoundHighway Traffic Sound
Source Receptor< Propagation Medium >
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DecibelDecibel
A-weightingA-weighting
Equivalent LevelEquivalent Level
DecibelDecibel
ENV 125 9/12/2019
PRESSUREmicro Pascals
LEVELdecibelsLEVELdecibels
L 10log (P )(P ) 10log
(P )(P )
DD (St)
2
ref2
o2
ref2
o2
2 2
ENV 125 9/12/2019
Rock Band
Pneumatic Hammer
Food Blender
Downtown
Vacuum Cleaner
Air Conditioning Unit
Dishwasher
Library
6,324,555
2,000,000
632,456
200,000
63,246
20,000
6,325
2,000
110
100
90
80
70
60
50
40
110
100
90
80
70
60
50
40
PRESSUREmicro PascalsSOURCES
LEVELdecibelsLEVELdecibels
L 10log (P )(P ) 10log
(P )(P )
DD (St)
2
ref2
o2
ref2
o2
2 2
ENV 125 9/12/2019
SOURCESSOURCESRock Band
Pneumatic Hammer
Food Blender
Downtown
Vacuum Cleaner
Air Conditioning Unit
Dishwasher
Library
Rock Band
Pneumatic Hammer
Food Blender
Downtown
Vacuum Cleaner
Air Conditioning Unit
Dishwasher
Library
LEVELdecibelsLEVELdecibels
110
100
90
80
70
60
50
40
110
100
90
80
70
60
50
40
x2
120
ENV 125 9/12/2019
SOURCESSOURCESRock Band
Pneumatic Hammer
Food Blender
Downtown
Vacuum Cleaner
Air Conditioning Unit
Dishwasher
Library
Rock Band
Pneumatic Hammer
Food Blender
Downtown
Vacuum Cleaner
Air Conditioning Unit
Dishwasher
Library
LEVELdecibelsLEVELdecibels
110
100
90
80
70
60
50
40
110
100
90
80
70
60
50
40
63
ENV 125 9/12/2019
A-weightingA-weighting
DecibelDecibel
A-weightingA-weighting
Equivalent LevelEquivalent Level
ENV 125 9/12/2019
ENV 125 9/12/2019
6,3006,300
1,0001,000
7 8 9 >
4 5 6 <
1 2 3 /
DIS PRO OUT SEC
ENT NEX CLR SFT
0 + - %
SOUND ANALYZER
MIKEE-LECTRONICSMIKEE-LECTRONICS
65707585757065
-weighting-weighting
ENV 125 9/12/2019
DecibelDecibel
Equivalent LevelEquivalent Level
A-weightingA-weighting
Equivalent LevelEquivalent Level
ENV 125 9/12/2019
L = 1 0 lo g 1T 1 0 L
1 0 e q 1 0 t
t=1
N
time
soun
d le
vel
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SOUND LEVELSOUND LEVEL
-1 dBA Not perceptible
-3 dBA Barely perceptible
-5 dBA Readily perceptible
Change LoudnessSubjective
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OVERVIEW
OVERVIEW
Sound/NoiseSound/Noise
Noise AnalysesNoise AnalysesNoise AnalysesNoise Analyses
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Traffic Noise Policy and Guidance
TxDOT Policy conforms to federal rule (regardless of funding)
– 23 CFR 772
2019 Noise Policy Effective Date: December 31, 2019
18
On Noise ToolkitFHWA Approved on
December 31, 2018
Streamlined - Requirements OnlyApproved by FHWA
Coming Soon toNoise Toolkit
User-friendly GuidanceDetails, how-to instructions & examples
ENV 125 9/12/2019
Overview of Traffic Noise Analysis Process
19
OR
Determine Need for a Traffic Noise Analysis(Type I project)
Collect Data
Determine Impact
Consider/EvaluateAbatement Measures
Measure/Model Noise Levels
Existing Levels(Field Measurement, Model,
Model Validation)
Predicted Levels(Model)
IF
Predicted levels exceed existing by more than
10 dB(A)
Predicted levels approach, equal, or exceed the NAC
Absolute impact Relative impact
Propose Abatement Traffic Noise Workshop(s)
ENV 125 9/12/2019
Determine if a Type I project
The construction of a highway on new location; or,
The physical alteration of an existing highway where there is either:
– Substantial Horizontal Alteration
– Substantial Vertical Alteration
The addition of a through-traffic lane(s)
The addition of an auxiliary lane, except for when the auxiliary lane is a turn lane; or,
The addition or relocation of interchange lanes or ramps added to a quadrant to complete an existing partial interchange; or,
Restriping existing pavement for the purpose of adding a through-traffic lane or an auxiliary lane; or,
The addition of a new or substantial alteration of a weigh station, rest stop, ride-share facility, or toll plaza.
20
ENV 125 9/12/2019
Traffic Data!!!!
First thing to do when you know you have a Type I analysis
GET TRAFFIC DATA!!!!
21
TrafficInformation
Existing
Predicted
Speed Limits
Collect Data
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Traffic Data
22
Receiver< Propagation Medium >Source
- Future -- 20 years
- Existing Traffic
Traffic Data
- Future Traffic- Worse-Case
- Full Speed- Predicted dBA
ENV 125 9/12/2019
Traffic Data Request
23
When requesting Traffic Data use TPP Form 2124
Make sure to fill in check boxes for
– 1 (Basic Highway Traffic Data)
– 2 (Vehicle Classification for Environmental Studies)
– 3 (Line Diagram Analysis)
ALL TRAFFIC MUST BE FROM TPP OR APPROVED BY TPP
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Traffic Data: Tabular Data
24
2020 2040
(2020 to 2040)
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Traffic Data: Line Diagram with Turning Movements
25
Light Duty Vehicles
Medium Duty Vehicles
Heavy Duty Vehicles
% of ADT % of DHV
91.0 92.8
6.0 4.2
3.0 3.0
% of ADT % of DHV
97.0 98.3
2.0 1.7
1.0 0.0
Frontage Roadsand
StreetsMainlanes
K-factor: 10.5%
3180021700
36001600
47003000
339002260031800
21700
3520023500
62004100
1300900
1000500
1000500
34001500800
400
800400
49003200
AVERAGE DAILY TRAFFIC (ADT) VOLUMES
SH 123
DHV = ADT (x) K-factor
65SPEEDLIMIT
40SPEED
LIMIT
LEGEND1000 - 2020 ADT1000 - 2040 ADT
Projects that involve more than mainlanes and frontage roads typically with require a depiction of turning movements - - from TPP.
ENV 125 9/12/2019
Collect DataCollect Data DesignInformation
Roadways
Receivers
Site Characteristics
Source of SoundSource of Sound
Receiver of SoundReceiver of Sound
Propagation PathPropagation Path
Design Data
ENV 125 9/12/2019
Roadway Design and Site Characteristics
Electronic CAD files with Roadway Design
– Striping
– Edge of Pavement
– Any other relevant design information
Adjacent Topography if available
– Other sources would be GIS, Google Earth, Surveys
ELEVATIONS ARE CRITICAL TO BARRIER DESIGN
27
ENV 125 9/12/2019
A Brief Overview of the Traffic Noise Process
The major objectives of a traffic noise analysis are to:
– Identify areas where possible noise impacts may occur for each project alternative.
– Consider and evaluate abatement measures to mitigate these impacts.
– Propose implementation of feasible and reasonableabatement measures.
– Communicate the results to the public and local officials.
Important: it is never too early to discuss possible noise abatement
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Identify Noise-sensitive Land Uses
Identify adjacent land uses for noise sensitive areas (residences, schools, churches, parks, etc)
INCLUDES PERMITTED DEVELOPMENT
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Noise Receiver Selection Criteria
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Existing Levels Predicted Levels
Measured bySound Meter
OR
Determining Traffic Noise Levels
DetermineNoise Levels
Modeled byComputer
ModeledModeled
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Noise Modeling Software
FHWA’s Traffic Noise Model (TNM) is used to model roadways and receivers to determine impacts and effectiveness of abatement
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Determining Traffic Noise Levels
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Determine ImpactDetermine Impact
Predicted levels approach,equal, or exceed the NAC
ABSOLUTE CRITERION
Predicted levels exceedexisting by more than 10 dBA
RELATIVE CRITERION
OR
IF
Determining Traffic Noise Impacts
ENV 125 9/12/2019
Activity Category
FHWA(dB(A) Leq) Description of Land Use Activity Areas
A57
(exterior)
Lands on which serenity and quiet are of extra-ordinary significance and serve an important public need and where the preservation of those qualities is essential if the area is to continue to serve its intended purpose.
B67
(exterior)Residential
C67
(exterior)
Active sport areas, amphitheaters, auditoriums, campgrounds, cemeteries, day care centers, hospitals, libraries, medical facilities, parks, picnic areas, places of worship, playgrounds, public meeting rooms, public or nonprofit institutional structures, radio studios, recording studios, recreation areas, Section 4(f) sites, schools, television studios, trails, and trail crossings
D52
(interior)
Auditoriums, day care centers, hospitals, libraries, medical facilities, places of worship, public meeting rooms, public or nonprofit institutional structures, radio studios, recording studios, schools, and television studios
E72
(exterior)Hotels, motels, offices, restaurants/bars, and other developed lands, properties, or activities not included in A-D or F.
F --Agriculture, airports, bus yards, emergency services, industrial, logging, maintenance facilities, manufacturing, mining, rail yards, retail facilities, shipyards, utilities (water resources, water treatment, electrical) and warehousing
G -- Undeveloped lands that are not permitted
Noise Abatement Criteria
ENV 125 9/12/2019
Activity Category
FHWA(dB(A) Leq) Description of Land Use Activity Areas
A57
(exterior)
Lands on which serenity and quiet are of extra-ordinary significance and serve an important public need and where the preservation of those qualities is essential if the area is to continue to serve its intended purpose.
B67
(exterior)Residential
C67
(exterior)
Active sport areas, amphitheaters, auditoriums, campgrounds, cemeteries, day care centers, hospitals, libraries, medical facilities, parks, picnic areas, places of worship, playgrounds, public meeting rooms, public or nonprofit institutional structures, radio studios, recording studios, recreation areas, Section 4(f) sites, schools, television studios, trails, and trail crossings
D52
(interior)
Auditoriums, day care centers, hospitals, libraries, medical facilities, places of worship, public meeting rooms, public or nonprofit institutional structures, radio studios, recording studios, schools, and television studios
E72
(exterior)Hotels, motels, offices, restaurants/bars, and other developed lands, properties, or activities not included in A-D or F.
F --Agriculture, airports, bus yards, emergency services, industrial, logging, maintenance facilities, manufacturing, mining, rail yards, retail facilities, shipyards, utilities (water resources, water treatment, electrical) and warehousing
G -- Undeveloped lands that are not permitted
IIMMPPAACCTT
ABSOLUTE CRITERION
“approach, equal or exceed”……1 dBA below
Determining Traffic Noise Impacts
ABSOLUTE CRITERION
ENV 125 9/12/2019
Activity Category
FHWA(dB(A) Leq) Description of Land Use Activity Areas
A57
(exterior)
Lands on which serenity and quiet are of extra-ordinary significance and serve an important public need and where the preservation of those qualities is essential if the area is to continue to serve its intended purpose.
B67
(exterior)Residential
C67
(exterior)
Active sport areas, amphitheaters, auditoriums, campgrounds, cemeteries, day care centers, hospitals, libraries, medical facilities, parks, picnic areas, places of worship, playgrounds, public meeting rooms, public or nonprofit institutional structures, radio studios, recording studios, recreation areas, Section 4(f) sites, schools, television studios, trails, and trail crossings
D52
(interior)
Auditoriums, day care centers, hospitals, libraries, medical facilities, places of worship, public meeting rooms, public or nonprofit institutional structures, radio studios, recording studios, schools, and television studios
E72
(exterior)Hotels, motels, offices, restaurants/bars, and other developed lands, properties, or activities not included in A-D or F.
F --Agriculture, airports, bus yards, emergency services, industrial, logging, maintenance facilities, manufacturing, mining, rail yards, retail facilities, shipyards, utilities (water resources, water treatment, electrical) and warehousing
G -- Undeveloped lands that are not permitted
ABSOLUTE CRITERION
OR, if predicted levels exceedexisting by more than 10 dBAOR, if predicted levels exceedexisting by more than 10 dBA
Determining Traffic Noise Impacts IIMMPPAACCTT
RELATIVE CRITERION
“approach, equal or exceed”……1 dBA below
ENV 125 9/12/2019
A Brief Overview of the Traffic Noise Process
The major objectives of a traffic noise analysis are to:
– Identify areas where possible noise impacts may occur for each project alternative.
– Consider and evaluate abatement measures to mitigate these impacts.
– Propose implementation of feasible and reasonableabatement measures.
– Communicate the results to the public and local officials.
Important: it is never too early to discuss possible noise abatement
38
ENV 125 9/12/2019
Consider Abatement Measures
39
ENV 125 9/12/2019
Noise AbatementNoise Abatement
Source Receptor- Propagation Path -
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Noise Barrier
Source Receptor- Propagation Path -
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Evaluate Abatement Measures
42
ENV 125 9/12/2019
ReasonableANDAND
ProposeAbatement
EvaluateAbatement Measures
Feasible
Evaluate Abatement Measures
ENV 125 9/12/2019 44
Category FEASIBLE REASONABLE
Acoustic Reduction
Provides at least a 5 dB(A) reduction (“benefit”) for a majority of impacted first-
row receptors
AND
Benefits a minimum of two impacted receptors
Provides a substantial noise reduction consisting of a predicted reduction of at least 7 dB(A) for at least one receptor
(Noise Reduction Design Goal)
Cost n/aDoes not exceed 1,500 square feet per
benefited receptor(Standard Barrier Cost analysis)
Site Constraints
Is it possible to build given topography, access requirements, local cross streets, other noise sources, drainage, utilities,
and maintenance requirements?
Estimated costs to overcome site constraints are not unreasonably high
(Alternate Barrier Cost analysis)
Viewpoints of property owners
and residentsn/a
A majority of votes received from benefited and bordering receptors indicate that they
want the barrier
Summary of Abatement Criteria (2019 Noise Policy)
ENV 125 9/12/2019
Acoustic Reduction Requirements
45
A noise abatement measure is not acoustically feasible unless it
– achieves a noise reduction of at least 5 dB(A) at greater than 50% of first-row impacted receptors
– AND benefits a minimum of two impacted receptors.
To be acoustically reasonable, a noise abatement measure must also achieve a reduction in noise of at least 7 dB(A) – a substantial noise reduction – for at least one benefited receptor.
ENV 125 9/12/2019
Cost Reasonableness – Standard Barrier Cost
46
2011• Less than 1,388 square feet
per benefited receptor• ($18 square foot/$25k per benefiter)
2019• Less than 1,500 square feet
per benefited receptor• ($35 square foot/$52.5k per benefiter)
ENV 125 9/12/2019
Cost Reasonableness
47
• Less than 1,500 square feetper benefited receptor
• ($35 square foot/$52.5k per benefiter)
ENV 125 9/12/2019
Cost Reasonableness
48
12’
375’
• Less than 1,500 square feetper benefited receptor
• ($35 square foot/$52.5k per benefiter)
ENV 125 9/12/2019
Feasibleeffectivereductionin noise -?-?
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Feasible
-?-?-5 (or more)
ENV 125 9/12/2019
Feasible
-?-?-5 (or more)
Reasonable
Cost-reasonablenessCriterion
Cost-reasonablenessCriterion
Size for eachBenefited Receptor
Size for eachBenefited Receptor
1,500 square feet(or less)
1,500 square feet(or less)
ENV 125 9/12/2019
Reasonable
1500 sq ft(or less)-?-?(or more)
ANDFeasible
-5-5
-4 -4-5 -5 -5 -7 -5 -5? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? NOISE BARRIER ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? NOISE BARRIER ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
For ExampleFor Example
ENV 125 9/12/2019
-?-?-5 (or more)
Feasible
(or less)(or less)
ReasonableANDAND
Total Cost6,000 total sq ft
-4 -4-5 -5 -5 -7 -5 -5? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? NOISE BARRIER ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? NOISE BARRIER ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
6 benefiters= 1,000 sq ft
Sq Ft for eachBenefited Receptor
Sq Ft for eachBenefited Receptor
Total Sq Ft #BenefitedTotal Sq Ft #Benefited=
1,500 sq ft1,500 sq ft
ENV 125 9/12/2019
Cost Reasonableness – Alternate Barrier Cost
If unusual construction is required, this cost can be accounted for with an alternate cost method….
54
Not cost reasonable if the Alternate Barrier Cost is
greater than two times the Standard Barrier Cost
(currently 2X = $105k per benefiting receptor)
ENV 125 9/12/2019 55
Cost Reasonableness – Alternate Barrier Cost
Optional Method!
ENV 125 9/12/2019
A Brief Overview of the Traffic Noise Process
The major objectives of a traffic noise analysis are to:
– Identify areas where possible noise impacts may occur for each project alternative.
– Consider and evaluate abatement measures to mitigate these impacts.
– Propose implementation of feasible and reasonableabatement measures.
– Communicate the results to the public and local officials.
Important: it is never too early to discuss possible noise abatement
56
ENV 125 9/12/2019
A Brief Overview of the Traffic Noise Process
Noise Barrier
AKA Sound Walls
57
ENV 125 9/12/2019
Other Noise Reduction Measures
Why not pavement or vegetation?
58
ENV 125 9/12/2019
15 feet
VegetationVegetation
100 feet = perceptiblereduction
ENV 125 9/12/2019
VegetationVegetation- dense enough that it cannot be seen through- coverage: floor to canopy- evergreen
- dense enough that it cannot be seen through- coverage: floor to canopy- evergreen
ENV 125 9/12/2019
- dense enough that it cannot be seen through- coverage: floor to canopy- evergreen
- dense enough that it cannot be seen through- coverage: floor to canopy- evergreen
VegetationVegetation
ENV 125 9/12/2019
VegetationVegetation“... provides only psychological benefits”“... may be provided for visual, privacy or
aesthetic treatment”“... not a noise abatement measure”
“... provides only psychological benefits”“... may be provided for visual, privacy or
aesthetic treatment”“... not a noise abatement measure”
ENV 125 9/12/2019
PavementPavement
ENV 125 9/12/2019
PRIORITIESNOISE
ENV 125 9/12/2019
PRIORITIES
NOISE
SAFETYDURABILITY
*FHWA:“should never be jeopardized”
**
ENV 125 9/12/2019
FHWA Concern ….. can “quiet” pavement continue to effectivelyreduce noise levels over the lifeof the pavement?
FHWA Concern ….. can “quiet” pavement continue to effectivelyreduce noise levels over the lifeof the pavement?
FHWATraffic Noise
Policy
FHWATraffic Noise
Policy
“The use of specific pavement types or surface textures must not be considered as a noise abatement measure.”
“The use of specific pavement types or surface textures must not be considered as a noise abatement measure.”
ENV 125 9/12/2019
FHWA Concern ….. can “quiet” pavement continue to effectivelyreduce noise levels over the lifeof the pavement?
FHWA Concern ….. can “quiet” pavement continue to effectivelyreduce noise levels over the lifeof the pavement?
FHWATraffic Noise
Policy
FHWATraffic Noise
Policy
“The use of specific pavement types or surface textures must not be considered as a noise abatement measure.”
“The use of specific pavement types or surface textures must not be considered as a noise abatement measure.”
“Additional research is needed to determine to what extent different types of pavements contribute to traffic noise.”
“Additional research is needed to determine to what extent different types of pavements contribute to traffic noise.”
ENV 125 9/12/2019
ENV 125 9/12/2019
A Brief Overview of the Traffic Noise Process
The major objectives of a traffic noise analysis are to:
– Identify areas where possible noise impacts may occur for each project alternative.
– Consider and evaluate abatement measures to mitigate these impacts.
– Propose implementation of feasible and reasonableabatement measures.
– Communicate the results to the public and local officials.
Important: it is never too early to discuss possible noise abatement
69
ENV 125 9/12/2019
Traffic Noise Analysis Documentation
Traffic Noise Analysis Technical Report
Traffic Noise Model Files and Traffic Data
Constructability Assessment and/or Alternate Barrier Cost Assessment Worksheet
Local Official Letter (sent after environmental decision)
Noise Workshop Documentation
Documentation of Reevaluations for Noise
Barrier Inventory Information
70
ENV 125 9/12/2019
Documentation Templates
Examples of Recommended Text for Documenting Traffic Noise Analyses
Found in Traffic Noise Toolkit
New version (updated for 2019 Policy) is coming soon!
71
ENV 125 9/12/2019
Traffic Noise Analysis Submittal
Traffic Noise Analysis Technical Report
A .ZIP file containing the noise model files
– objects.dat and objects.idx files in separate, namedfolders for each model
– Models for existing, proposed, contours, and barrieranalysis
– May include other backup documentation in the zip file
Copy of approved traffic data (TPP memo) used for analysis
– Preferably attached to the tech report
72
ENV 125 9/12/2019
Documentation – TNM Files
TNM model
73
ENV 125 9/12/2019
Noise Workshop
74
??????????????????????? SOUND WALL ??????????????????????
Consent of a Majority of BENEFITING AND BORDERING Property Owners
Benefiting receptors can be on the second (or any row)!!!
ENV 125 9/12/2019
Noise Workshop
Purpose: To provide sufficient information to owners and non-owner residents of property benefiting or bordering a proposed noise barrier(s) that will allow these receptors to make an informed vote for or against the proposed noise barrier(s).
Timing: Recommend after the CE determination or, for an EA or EIS project, after the public hearing has occurred
– wait until closer to construction letdate to avoid issues with designrefinements or changes after theinitial environmental decision
– Constructability analysis?
INFORMAL PUBLIC INVOLVEMENTCAN HAPPEN AT ANY TIME IN THEPROJECT’S DEVELOPMENT.
75
ENV 125 9/12/2019
Noise Workshop
Must conduct at least one informative “noise workshop”
Who can vote?
Send ballots to:
– all benefited receptors
– non-benefited receptors that border or are directly adjacent to a proposed abatement measure
Both property owners and non-owner residents are eligible to vote
76
ENV 125 9/12/2019
Noise Workshop
77
PROPOSED NOISE BARRIER
-5.4 -4.6
-2.3-3.5-4.1
-6.3 -7.8 -6.3 -5.2
-5.0 -4.5 -3.7
ENV 125 9/12/2019
Noise Workshop: Mailing
Include a description of the noise barrier and the noise effects with and without the barrier.
Include a description of the decision-making process that TxDOT will follow to assess the survey/ballot results and make a decision on whether to build the barrier.
Include an invitation to the meeting with the location and time
Enclose a ballot, a noise brochure, and a prestamped/preaddressed return envelope
78
ENV 125 9/12/2019
Noise Workshop: Sample Ballot
79
ENV 125 9/12/2019
Noise Workshop
80
Weighted Ballot
One vote allocated per residential receptor(i.e. each house or apartment unit)
10% of vote to resident or renter (0.1 vote)90% of vote to owner (0.9 vote)
If owner-occupied, response counts as 1 vote
Tallying Votes
Clarification: Failure to respond does not mean a “yes” or a “no” vote.
Approval of a noise barrier based on majority of votes RECEIVED
ENV 125 9/12/2019
Noise Workshop
Low Response Rate
Recommend additional rounds of voting to achieve a response from a majority of receptors
If less than a 25% response rate after two rounds of voting, then decision made after required consultation with ENV SMEs and TxDOT management
Re-voting
Once a decision has been made to build or not build,re-voting is only considered when:
– An error in original noise workshop voting process
– A substantial change to a proposed abatement sincethe workshop
– An approved barrier has not been constructed withinfive years of a noise workshop, due to project delays
81
ENV 125 9/12/2019
Workshop Documentation
Template: Documentation ofNoise Workshop
Found in Traffic Noise Toolkit
82
ENV 125 9/12/2019
Workshop Documentation
Short narrative description and/or tables that:
– Summarize results of voting
– Indicate whether barriers will or will not beconstructed
– Discuss any issues, commitments or changesmade to proposed abatement after clearanceor as a result of noise workshop process
Copies of received ballots
Comment response matrix
Solicitation materials (notice and ballot)
Proof of mail-outs (if available)
Sign-in sheets from workshop
Noise workshop presentation
Exhibits/displays at the workshop
Photos from the workshop
83
ENV 125 9/12/2019
Letters to Local Officials
Used to inform local officials regarding the department’s responsibilities regarding noise abatement for new development once an environmental decision has been made.
Required for all projects adjacent to undeveloped lands
Cannot occur before document has been signed
Minimum notification:
– Urban area: Mayor’s Office
– Rural or suburban area: the County Judge’s Office.
Template letter found in Traffic Noise Toolkit
Notice of Availability Template found in Public Involvement Toolkit
84
ENV 125 9/12/2019
Prior to EnvClearance
Post-Construction
After EnvClearance
(also Reevaluations)
Noise Documentation in ECOS
Perform Notification of
Noise Information to Local Officials
Upload copies of local official letters within 30 days of clearance
Perform Noise Analysis
Review NoiseAnalysis
Upload noise analysis files to activityAssign reviews• Upload review comments• Upload revised analysis files• Assign follow-up review• Continue review steps until approvedIf design change after noise report approved and new analysis is prepared, add new activity
Review Noise Workshop
Perform Noise Workshop
When have proposed abatement in the approved environmental documentation• Separate file drawer (activity) for each
workshop and/or barrier• Upload workshop documentation, post-
clearance constructability analysis• Assign reviews
Perform Noise Mitigation
Barrier inventory• After one or more barriers are constructed• Upload noise barrier tracking spreadsheet
ENV 125 9/12/2019
Contact ENV Noise SMEs
Ray Umscheid
512-416-3025
Meredith Worthen
512-416-2612
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ENV 125 9/12/2019
Questions?
87