update on results of long- term traffic noise measurements for pavement overlay projects james a....
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Update on Results of Long-term Traffic Noise
Measurements for Pavement Overlay Projects
James A. Reyff
Illingworth & Rodkin, Inc.
2006 Summer Meeting TRB ACD40
Williamsburg, VA
Study Results Summarized
• I-80 Davis OGAC – 8 years
• State Route 138, Los Angeles County –
3+ years
• ADOT Pilot Studies – 2+ years
I-80 Pavement Project
Location: I-80 just east of Davis and west of Sacramento, CA
Traffic: 1998 - 120,000 ADT (almost 10% trucks)2004 - 135,000 ADT
• Existing - Aged AC surfacing• DGAC (60mm) applied in June 1998• OGAC (25 mm) applied in July 1998
I-80 Environment
Existing AC Pavement
6 Year Old OGAC
I-80 Davis 8yr Findings
65
70
75
80
85
Measurement Condition
No
ise L
evel (d
BA
)
Meas WB Leq TNM Modeled
I-80 Davis 7yr Findings
Seasonal Effect
65
70
75
80
Age of Pavement
Ave
rag
e M
easu
red
No
ise
Lev
el,
(dB
A)
Summer 78.6 72.8 73.3 73.7 73.3 73.7 74.6 74.8 75.1
Winter 74.2 73.9 74 74.6 75.1 75.1 75.7
Old AC
New 0.5yr 1 yr 1.5yr 2 yr 2.5yr 3 yr 3.5yr 4 yr 4.5yr 5 yr 5.5yr 6 yr 6.5yr 7 yr
I-80 Davis 8yr FindingsCalculated Reduction from Baseline
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
Age of Pavement
De
cre
as
e in
No
ise
Le
ve
l fr
om
Ba
se
lin
e C
on
dit
ion
, (d
BA
)
WB Reference 78.6 6.1 6.4 6.0 5.9 5.9 5.9 4.5 5.1 4.3 4.7
New OGAC
1 Mo. Aug
1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year
I-80 Davis 8yr FindingsTire/Pavement Sound Intensity
96
98
100
102
104
106
108
Sep 02 Apr 03 Jun 04 Dec 04 Apr 05 Jun 05 Dec 05 Apr 06 Jun 06
So
un
d In
ten
sity
Lev
el, d
BA
Frequency Spectra – 20m
7 Year Baseline
45
50
55
60
65
70
75
1/3rd Octave Center Frequency (Hz)
Noi
se L
evel
(d
BA
)
Baseline
1-Month
1-Year
2-Year
3-Year
4-Year
5-Year
6-Year
7-Year
8-Year
35
40
45
50
55
60
65
No
ise L
ev
el
(d
B)
35
40
45
50
55
60
65
1/3rd Octave Center Frequency (Hz)
No
ise L
ev
el
(d
B)
Baseline 1-month 1 Year 2 Year 3 Year 5 Year 6 Year 7 Year 8 Year
Frequency Spectra – 145m
8 Year
BaselineDOWNWIND
UPWIND8 Year Baseline
LA 138 Pavement Research• Research Site est. 2002• Two Measurement Techniques
– Statistical Passby– Onboard Tire/Pavement Sound
Intensity
• 5 Pavements types– DGAC– Thick OGAC (75mm)– Thin OGAC (30mm)– RAC– BWC
LA 138 Results
• Initial results documented by Volpe and Caltrans (Illingworth & Rodkin)
• Initial levels up to 4 dBA lower than DGAC with Thick OGAC and RAC quietest
• Regular testing of Tire/pavement sound intensity – spring and fall
LA 138 Results
0
1
2
3
4
5
6
7
8
OGAC - 75mm OGAC - 30mm RAC BWC
Red
uct
ion
in
No
ise
Lev
el,
dB
re
DG
AC
Passby at 25 ftPassby at 50 ftTire Intensity
LA 138 Results
SI Level – Eastbound SR 138
94
95
96
97
98
99
100
101
102
103
DGAC OGAC (75mm) OGAC (30mm) RAC BWC
Ove
rall
So
un
d In
ten
sity
Lev
el, d
BA
94
95
96
97
98
99
100
101
102
103
DGAC OGAC (75mm) OGAC (30mm) RAC BWC
Oct-02 Mar-03
Jul-03 Oct-03
Apr-04 Jan-05
Apr-05 Jun-05
Oct-05
Results of the Arizona Quiet Pavement Program – Sites 3D and 3E
Site 3D – AZ Route 202
Random Transverse Tined PCC
ARFC
250ft x 5ft50ft x 12ft & 5ft
100ft x 5ft
Site 3D Measurements
Site 3D Results – Leq
55
60
65
70
75
80
85
90
10:0
0
10:3
0
11:0
0
11:3
0
7:25
7:55
8:25
8:55
9:05
9:35
10:0
5
10:3
5
9:00
9:30
10:0
0
10:3
0
Time of Day
So
un
d P
ress
ure
Lev
el, d
BA
50ft/12ft
50ft/5ft
100ft/5ft
250ft/5ft
Oct. 16, 2004 Oct. 17, 2004Oct. 05, 2003
Post Overlay
Oct. 06, 2003
Pre Overlay
Downwind
Downwind Downwind
Downwind
AM Rush Hour
3D Results – Normalized for Traffic
Position
Measured Modeled
ChangePre Post Pre Post
50 ft/12ft 84.3 70.9 75.1 74.1 -12.4
50ft / 5ft 83.2 70.9 75.2 74.2 -11.3
100ft / 5ft 76.8 65.6 72.8 71.8 -10.1
250ft / 5ft 68.9 59.7 68.0 66.9 -8.1
3D Results – Leq Data
60
65
70
75
80
85
90
10:0
0
11:2
0
7:40
8:45
10:0
5
9:25
9:30
10:5
0
9:55
9:00
10:2
0
9:40
9:00
10:2
0
9:40
Time of Day
Sou
nd P
ress
ure
Leve
l, dB
A
50ft/12ft 50ft/5ft 100ft/5ft 250ft/5ft
October 2004 March 2006
April 2004
Post Overlay
October 2005
Pre Overlay
March 2005
Site 3E – AZ Route 101
Uniform Transverse Tined PCC
ARFC
Site 3E – Measurements
100ft x 5ft
50ft x 12ft & 5ft
100ft x 5ft
Site 3E Results – Leq
60
65
70
75
80
85
90
9:00
9:30
10:0
0
10:3
0
9:25
9:55
10:2
5
10:5
5
9:20
9:50
10:2
0
10:5
0
9:30
10:0
0
10:3
0
11:0
0
Time of Day
So
un
d P
ress
ure
Lev
el, d
BA
50ft/12ft
50ft/5ft
100ft/5ft
Oct. 19, 2004 Oct. 20, 2004April 06, 2004
Post Overlay
April 07, 2004
Pre Overlay
Downwind Downwind DownwindDownwind
3E Results – Normalized for Traffic
Position
Measured Modeled
ChangePre Post Pre Post
50 ft/12ft 84.2 74.9 80.2 79.8 -9.0
50ft / 5ft 81.6 73.2 79.9 79.8 -8.3
100ft / 5ft 78.6 69.8 76.9 76.8 -8.7
3E Results – Leq Data
60
65
70
75
80
85
90
9:00
9:20
9:40
10:0
0
10:2
0
10:4
0
9:00
9:20
9:40
10:0
0
10:2
0
10:4
0
9:00
9:20
9:40
10:0
0
10:2
0
10:4
0
9:15
9:35
9:55
10:1
5
10:3
5
10:5
5
9:15
9:35
9:55
10:1
5
10:3
5
10:5
5
9:00
9:20
9:40
10:0
0
10:2
0
10:4
0
9:00
9:20
9:40
10:0
0
10:2
0
10:4
0
9:00
9:20
9:40
10:0
0
10:2
0
10:4
0
Time of Day
So
un
d P
ress
ure
Lev
el,
dB
A
50ft/8.7ft
50ft/5ft
100ft/5ft
October 2004 March 2006
April 2004
Post Overlay
October 2005
Pre Overlay
Sound Level vs. DistanceMeasured PCC and ARFC
55
60
65
70
75
80
85
10 100
Distance from Near Travel Lane (meters)
Sou
nd P
ress
ure
Leve
l, dB
A
Measured ARFC Measured PCC
Sound Level vs. DistanceMeasured and Modeled
55
60
65
70
75
80
85
10 100
Distance from Near Travel Lane (meters)
Sou
nd P
ress
ure
Leve
l, dB
A
Measured ARFC Modeled (Hard Ground) Modeled (Field Grass) Measured PCC
250ft x 5ft50ft x 12ft & 5ft
100ft x 5ft
Site 3D Measurements
Equivalent Noise Barrier Performance
Site at 100 ft
Measured Noise
ReductionNoise Barrier
Height
Site 3D 10 dBA 3.6m (12 ft)
Site 3E 9 dBA 3.0m (10 ft)
I-280 San Mateo
• Existing PCC surface
• PCC and Rubberized Open Grade
• Onboard Tire/Pavement Sound Intensity
Initial Results for I-280
0
1
2
3
4
5
6
7
Reduction by OGRA Reduction by TexturedGrinding PCC
Reduction by RegularGrinding PCC
Re
du
cti
on
in
So
un
d I
nte
nsi
ty L
ev
el,
dB
Results for I-280 after 3 yrs
92
94
96
98
100
102
104
106
SB RAC(0) SB PCC SB PCC NB PCC NB PCC NB RAC(0)
So
un
d In
ten
sit
y L
ev
el,
dB
A
Existing PCC
2002
2005
RAC (O)