CDOT Quiet Pavement Research Program - RPUG Sohaney.pdf · Quiet Pavement Research Program...
Transcript of CDOT Quiet Pavement Research Program - RPUG Sohaney.pdf · Quiet Pavement Research Program...
Experiences with CDOT’s Quiet Pavement Research Program
Presented by:Richard Sohaney
The Transtec Group, Inc
RPUG 2011September 28, 2011
Acknowledgements
Colorado DOTRoberto DeDiosGary DeWittJay GoldbaumSteve OlsonVanessa HendersonDonna HarmelinkBob MeroBill SchiebelTammie SmithJordan RudelJill SchlaeferRichard Zamora
TranstecRobert RasmussenRobert WhirledgeRobert Watson
FHWA Noise PolicyFor federal funding on highway projects:
23 CFR 772 appliesNoise impact analysis required
Noise abatement options:Noise barriers (walls)Traffic managementAlignment changesBuffer zonesInsulation
FHWA PolicyTo use quieter pavement for noise abatement:
Special FHWA approval requiredMust conduct a Quiet Pavement Pilot Program (QPPP)Agency must commit to the noise abatement levelArizona did it!
Alternative:Conduct Quiet Pavement Research (QPR)
Quieter Pavement ResearchResearch objectives:
Determine noise benefits for specific pavementsDetermine noise behavior as pavements ageProvide data for use in traffic noise modeling and validation
Noise = f (pavement type, texture, age, time, traffic, location)
CDOT Data Collection PlanMeasurement methods
Source (by the tire)Wayside (by the road)
SitesInitially: 30Finally: 34 (+1 in 2007, +3 in 2009)
Measurement times4 periods: 2006, 2007, 2009, 2011
Source Measurement MethodClose proximity to the source
On-board sound intensity (OBSI) method
60 mph Test Speed
Test Section Length
Wayside Measurement MethodWayside (roadside)
Isolated pass-by:Applies when traffic is lightPass-by noise from individual vehicles can be isolated
Time averaged pass-by:Applies when traffic is dense
Microphone
Measurement MethodsSource (OBSI)
Representative of how much noise is generated at the tire-pavement interfaceMobile measurement method
Wayside (pass-by)Representative of what listeners experienceFixed measurement locationsEvaluates traffic noise in categories: car, light truck, heavy truck
Good correlation between the two methods
Test SitesTest sites
Initially: 30 (in 2006)Finally: 34 (+1 in 2007, +3 in 2009)
PavementsSMAHMANova ChipPCC (various textures)Crumb rubber modified asphalt
258
10
11
14
15
171819
20
22
23
24
26
2829
31
4 6
3
7
9
12
13
1621 25
27
301
323334
3
7
9
12
16
21
25
27
30
1
Site 1US 83, Parker
Sites 28/29Powers Blvd., Colorado Springs
Site 8I-70, Bakerville
Managing Changes from 2006 - 2011Test procedure changes
Test tireGoodyear Aquatred IIIASTM F 2493 SRTT
Microphone fixtureSingle probeDual probe
Test method standardized
Environmental changesYear-to-year temperature differencesPavement rehabilitation
Key FindingsResults up through 2009 publishedDatabase of pavement types and tire-pavement noise
Useful for rankingIdentifying trends
Correlation of wayside and source measurementsTire-pavement noise by vehicle type
2009 Findings
98
99
100
101
102
103
104
105
106
107
Site20
- US 40
(Kit C
arson
) - Con
crete
Site13
- I-25
(Erie
) - Con
crete
(Long
. Tini
ng)
Site25
- I-76
(Hen
derso
n) - C
oncre
te
Site28
- Pow
ers Blvd
. (Colo
rado S
pring
s) - C
oncre
te (D
rag)
Site24
- I-76
(Hud
son)
- Con
crete
Site30
- US 85
(Sed
alia )
- Con
crete
(Burl
ap D
rag)
Site26
- I-25
(Mon
umen
t ) - C
oncre
te
Site15
- I-25
(Colo
rado S
pring
s ) - C
oncre
te (Lo
ng. G
roovin
g)
Site27
- C-47
0 (Morr
ison)
- Con
crete
Site16
- SH 12
1 (Lit
tleton
) - Con
crete
(Carp
et Drag
)
Site17
- I-70
(Rifle
) - Con
crete
(Diam
ond G
rindin
g)
Site18
- US 28
5 (Ind
ian H
ills) -
Concre
te (D
iamon
d Grin
ding)
Site14
- US 28
5 (Ind
ian H
ills) -
Concre
te (Lo
ng. T
ining
)
Site34
- US 34
(Gree
ley) -
Aspha
lt (CRM, T
ermina
l)
Site33
- US 34
(Gree
ley) -
Aspha
lt (CRM, W
etProc
)
Site32
- US 34
(Gree
ley) -
Aspha
lt (PG 64
-28)
Site22
- US 16
0 (Alam
osa )
- Asp
halt
Site06
- US 50
(Gran
d Jun
ction
) - Asp
halt (
SX, 1/2"
)
Site10
- US 28
7 (La
porte
) - Asp
halt (
S, 3/4"
)
Site23
- I-70
(Gran
d Jun
ction
) - Asp
halt
Site08
- I-70
(Bak
erville
(E of
Dillo
n)) - A
spha
lt (SX, 1
/2")
Site07
- US 85
(Sed
alia )
- Asp
halt (
SX, 1/2"
)
Site21
- US 28
5 (Morr
ison)
- Asp
halt (
S, 3/4"
)
Site04
- US 50
(Gran
d Jun
ction
) - SMA (1
/2")
Site09
- C-47
0 (Morr
ison )
- SMA (1
/2")
Site05
- SH 74
(Eve
rgree
n) - S
MA (3/8"
)
Site01
- US 83
(Park
er) - S
MA (3/4"
)
Site29
- Pow
ers Blvd
. (Colo
rado S
pring
s) - S
MA
Site19
- I-70
(Gyp
sum) -
SMA
Site03
- I-70
(Den
ver)
- SMA (3
/4")
Site02
- I-70
(Gold
en) -
SMA (3/4"
)
Site31
- I-70
(Geo
rgetow
n) - S
MA (3/4"
)
Site12
- SH 58
(Gold
en) -
NovaC
hip
Site11
- SH 82
(Bas
alt) -
NovaC
hip
Site / Nominal Surface
Ove
rall
A-W
eigh
ted
OB
SI L
evel
(dB
ref 1
pW
/m²)
200620072009
OBSI Results
2009 FindingsEffect of Temperature on NoiseHot-Mix Asphalt Pavements
y = -0.0451x + 0.8607R2 = 0.4709
y = -0.0363x - 0.2534R2 = 0.2062
y = -0.0425x + 0.4446R2 = 0.295
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
-80 -60 -40 -20 0 20 40 60 80
Ambient Air Temperature Difference (°F)
Ove
rall
A-W
td. O
BSI
Lev
el D
iffer
ence
(dB
ref 1
pW
/m²)
All Flexible 2007-2006
All Flexible 2009-2007
All Flexible 2009-2006
Slope Significance(2009-2007)
>99%
2009 Findings
71
72
73
74
75
76
77
100 101 102 103 104 105 106
Overall A-weighted OBSI Level, 60 mph, dB (ref 1 pW/m²)
A-w
eigh
ted
Stat
istic
al P
ass-
By
Inde
xC
ar, 6
0 m
ph, d
B (r
ef 2
0 μP
a)
Best 1:1 FitSPB(car) = OBSI - 28.4 dBA
SEE = 0.7 dBA Car pass-by and OBSI
NCHRP 1-44 Offset:28.5 dBA
Wayside vs. Source (OBSI)
2009 FindingsPass-by Noise by Vehicle Type
0
1
2
3
4
5
6
7
8
9
10
Site 4 Site 6 Site 10 Site 19 Site 20 Site 22 Average
A-w
eigh
ted
SPL
Diff
eren
ces
Hvy
Tru
ck m
inus
Car
, dB
(ref
20
μPa)
50×525×450×12
Heavy Trucks are~ 8 dB louder than Cars
What have we learned?Colorado has both quieter and louder pavements among all pavement types.
Correlations exist between source and wayside measurements.
Most pavements have increasing sound levels as they age
0.1 dBA per year on the averageSome changing up to 0.7 dBA per year
Noise levels are a function of temperatureHigher temperatures result in lower noise levelsMore sensitive for flexible pavements