03 Appendix B - Noise (1999)Appendices
A. Air Quality Appendix
B. Noise Appendix
Appendix B
NOISE
Frequency (Hz) -- The frequency is the number of times per second that a sound
pressure signal oscillates about the prevailing atmosphere. The unit of frequency is the
hertz.
Habitable Room -- A habitable room is defined as any room meeting the requirements
of the Uniform Building Code or other applicable regulations that is intended to be used for
sleeping, living, cooking or dining purposes, excluding such enclosed spaces as closets,
pantries, bath or toilet rooms, service rooms, connecting corridors, laundries, unfinished
attics, foyers, storage spaces, cellars, utility rooms and similar spaces.
Intrusive Noise -- That noise exceeding the existing ambient noise at a given location is
termed an intrusive noise. The relative intrusiveness of a sound depends upon its
amplitude, duration, frequency, time of occurrence and tonal or informational content, as
well as prevailing ambient noise level.
Line Source -- A noise source which generates sound along a line rather than at a single
fixed point.
L Percentile -- L percentiles represent the A -weighted sound level exceeded for the
identified percent of the sample time. For example, a value of 55 dBA Lio would mean
that 55 dBA was exceeded 10 percent of the time. Other L percentiles commonly used
include L50, L9o, L99, etc. The L50 corresponds to the average level of noise. The L 1 o
corresponds to peaks of noise in the time history of environmental noise.
Noise -- Noise is any unwanted sound, or sound that is undesirable because it interferes
with speech and hearing, or is intense enough to damage hearing, or is otherwise
annoying. The State Noise Control Act defines noise as "excessive undesirable sound".
Noise Attenuation -- Noise attenuation is the ability of a material substance, or medium
to reduce the noise level from one place to another or between one room and another.
Noise attenuation is specified in decibels.
Noise Contours -- The lines drawn around a noise source indicating constant or equal
level of noise exposure from that source are termed noise contours. CNEL and Ldn are
typical standards used for comparison.
Noise Sensitive Land Use -- Noise -sensitive land uses are land uses associated with
indoor and/or outdoor human activities that may be subject to stress and/or significant
interference from noise. They include residential (single-family and multi -family
dwellings, mobile home parks, dormitories and similar uses); transient lodging (including
hotels, motels and similar uses); hospitals, nursing homes, convalescent hospitals and
other facilities for long-term medical care; and public or private educational facilities,
libraries, churches and places of public assembly.
Outdoor Living Area -- Outdoor living area is a term used to define spaces that are
associated with residential land uses and are typically used for passive recreational
activities. Such spaces include patio areas, barbecue areas, jacuzzi areas, etc. Outdoor
areas usually not included in this definition are front yard areas, driveways, greenbelts,
maintenance areas and storage areas associated with residential land uses.
Point Source -- A stationary device which creates sounds while fixed or motionless.
RD -77-108 Noise Assumptions
I. Temporal Traffic Distribution Assumed (Percent)
Secondary and Larger Highways
Type of Vehicle
Overall
Day
Evening
Night
Automobile
92
69.30
12.90
9.60
Medium Truck
3
1.44
0.06
1.50
Heavy Truck
5
2.40
0.10
2.50
Riverside County Department of Health acoustical parameters for County highways.
Collector and Smaller Streets
Type of Vehicle
Overall
Day
Evening
Night
Automobile
97.4
73.6
13.6
10.22
Medium Truck
1.84
0.90
0.04
0.90
Heavy Truck
0.74
0.35
0.04
0.35
Riverside County Department of Health acoustical parameters for County highways.
Freeway utilized Caltrans truck mix data with the same temporal distribution.
II. Road Grade Assumptions -- level terrain and roadway.
III. Roadway Widths Assumed -- were based upon the traffic study and Endo
Engineering field observations.
I V. Speeds Assumed -- were as shown on the following table.
V . RD -77-108 Input Parameters -- see the tables on the following pages.
VI. Alpha-- was assumed to be zero (3 decibels per doubling of distance) except for
the freeway where alpha was assumed to be 0.5 (4.5 decibels per doubling of
distance).
Assumptions for FHWA RD -77-108 Noise Model
Roadway
Speeda
(mph)
Half-Widthb
Existing/2010
(feet)
Percent Trucks
(% Medium)
Jefferson Street
- N/O Avenue 50
55
6/25
8.00
37.50
- N/O Avenue 52
45
18/25
8.00
37.50
- N/O Avenue 54
45
6/6
8.00
37.50
PGA Boulevard
- S/O Avenue 54
35
25/24
2.58
71.32
Madison Street
- N/O Avenue 50
55
6/25
8.00
37.50
- N/O Avenue 52
55
6/25
8.00
37.50
- N/O Avenue 54
55
6/25
8.00
37.50
- N/O Airport Boulevard
55
18/25
8.00
37.50
- N/O Avenue 58
55
6/25
8.00
37.50
- N/O Resort Village Access
55
6/25
8.00
37.50
- N/O Avenue 60
55
6/6
8.00
37.50
- S/O Avenue 60
55
6/6
8.00
37.50
Active Adult Village Access
- S/O Avenue 60
55
6/6
2.58
71.32
Village Commons Access
- N/O Avenue 60
55
6/6
2.58
71.32
Monroe Street
- N/O Avenue 50
45
6/25
8.00
37.50
- N/O Avenue 52
55
6/25
8.00
37.50
- N/O Avenue 54
55
6/25
8.00
37.50
- N/O Airport Boulevard
55
6/6
8.00
37.50
- N/O Avenue 58
55
6/6
8.00
37.50
- S/O Avenue 58
55
6/6
8.00
37.50
- N/O Avenue 60
55
6/6
8.00
37.50
- S/O Avenue 60
55
6/6
8.00
37.50
- S/O S. Primary Housing Access
55
6/6
8.00
37.50
- N/O Avenue 62
55
6/6
8.00
37.50
Avenue 50
- W/O Jefferson Street
55
6/25
8.00
37.50
- E/O Jefferson Street
55
6/25
8.00
37.50
- E/O Madison Street
55
6/25
8.00
37.50
- E/O Monroe Street
55
6/6
8.00
37.50
Avenue 52
- W/O Jefferson Street
45
6/25
8.00
37.50
- E/O Jefferson Street
55
6/25
8.00
37.50
- E/O Madison Street
55
6/25
8.00
37.50
- E/O Monroe Street
55
6/6
8.00
37.50
Avenue 54
- W/O Jefferson Street
55
18/18
8.00
37.50
- E/O Jefferson Street
55
6/25
8.00
37.50
- E/O Madison Street
55
6/25
8.00
37.50
- E/O Monroe Street
55
6/6
8.00
37.50
a. Speed is based upon posted speed limits or conditions observed during field reconnaissance.
b. The half -width is the distance from the roadway centerline to the center of the outermost travel lane.
c. Truck mix provided by Riverside County Department of Health.
Assumptions for FHWA RD -77-108 Noise Model (Cont.)
Roadway
Speeda
(mph)
Half-Widthb
(feet)
Percent Trucks
(% Medium)
Airport Boulevard
- E/O Madison Street
50
6/6
8.00
37.50
- E/O Monroe Street
50
6/6
8.00
37.50
Avenue 58
- W/O Madison Street
55
6/6
8.00
37.50
- E/O Madison Street
55
6/6
8.00
37.50
- E/O Monroe Street
55
6/6
8.00
37.50
Resort Village Access
- W/O Madison Street
55
6/6
2.58
71.32
N. Pri. Housing Vil. Access
- E/O Monroe Street
55
6/6
2.58
71.32
Avenue 60
- E/O Madison Street
55
6/6
8.00
37.50
- W/O Monroe Street
55
6/6
8.00
37.50
- E/O Monroe Street
55
6/6
8.00
37.50
S. Pri. Housing Vil. Access
- E/O Monroe Street
55
6/6
2.58
71.32
Active Adult Vil. Access
- W/O Monroe Street
55
6/6
2.58
71.32
Avenue 62
- W/O Monroe Street
55
6/6
8.00
37.50
- E/O Monroe Street
55
6/6
8.00
37.50
a. Speed is based upon posted speed limits or conditions observed during field reconnaissance.
b. The half -width is the distance from the roadway centerline to the center of the outermost travel lane.
c. Truck mix provided by Riverside County Department of Health.
Year 2004 Ambient Exterior Noise Exposure
Roadway
A.D.T.a
(Veh/Day)
CNEL @
50 Feetb
Distance to Contours (Ft.)c
70 dBA 65 dBA 60 dBA
Jefferson Street
- N/O Avenue 50
20,760
77.4
273
863
2728
- N/O Avenue 52
18,920
76.3
186
585
1847
- N/O Avenue 54
20,090
75.9
193
611
1931
PGA Boulevard
- S/O Avenue 54
12,280
68.4
R/W
98
301
Madison Street
- N/O Avenue 52
290
58.9
R/W
R/W
R/W
- N/O Airport Boulevard
11,180
75.0
149
467
1475
- N/O Avenue 58
10,700
74.6
143
453
1432
- N/O Resort Village Access
7,800
73.2
104
328
1037
- N/O Avenue 60
7,800
73.2
104
328
1037
- S/O Avenue 60
7,840
73.2
104
328
1037
Monroe Street
- N/O Avenue 50
15,190
74.7
147
463
1465
- N/O Avenue 52
12,530
75.2
164
520
1644
- N/O Avenue 54
7,950
73.3
106
336
1061
- N/O Airport Boulevard
5,600
71.8
75
238
751
- N/O Avenue 58
4,590
70.9
61
193
611
- S/O Avenue 58
2,380
68.0
R/W
99
313
- N/O Avenue 60
2,380
68.0
R/W
99
313
- S/O Avenue 60
2,150
67.6
R/W
91
286
- S/O S. Primary Housing Access
2,150
67.6
R/W
91
286
- N/O Avenue 62
2,140
67.6
R/W
91
286
Avenue 50
- W/O Jefferson Street
14,540
75.9
193
611
1931
- E/O Jefferson Street
8,090
73.3
106
336
1061
- E/O Madison Street
7,840
73.2
104
328
1037
- E/O Monroe Street
7,550
73.0
99
313
990
Avenue 52
- W/O Jefferson Street
11,540
73.5
111
351
1111
- E/O Jefferson Street
6,610
72.5
88
279
883
- E/O Madison Street
6,500
72.4
86
273
863
- E/O Monroe Street
5,730
71.8
75
238
751
Avenue 54
- W/O Jefferson Street
180
57.1
R/W
R/W
R/W
- E/O Jefferson Street
11,420
74.8
150
474
1499
- E/O Madison Street
4,910
71.2
66
207
654
- E/O Monroe Street
2,290
67.9
R/W
97
306
Airport Boulevard
- E/O Madison Street
2,070
66.8
R/W
75
238
- E/O Monroe Street
2,730
68.0
R/W
99
313
Avenue 58
- W/O Madison Street
2,060
67.4
R/W
86
273
- E/O Madison Street
2,610
68.4
R/W
109
343
- E/O Monroe Street
1,590
66.3
R/W
67
212
a. A.D.T. = average daily two-way traffic volume.
b. CNEL is provided at 50 feet from all roadway centerlines .
c. All distances are measured from the centerline. R/W means the contour falls within the right-of-way.
Year 2004 Ambient Exterior Noise Exposure (Cont.)
Roadway
A.D.T.a
(Veli/Day)
CNEL @
50 Feetb
Distance to Contours (Ft.)c
70 dBA 65 dBA 60 dBA
Avenue 60
- E/O Madison Street
740
63.0
R/W
R/W
99
- W/O Monroe Street
740
63.0
R/W
R/W
99
- E/O Monroe Street
600
62.1
R/W
R/W
81
Avenue 62
- W/O Monroe Street
1,610
66.3
R/W
67
212
- E/O Monroe Street
1,520
66.1
R/W
64
202
a. A.D.T. = average daily two-way traffic volume.
b. CNEL is provided at 50 feet from all roadway centerlines .
c. All distances are measured from the centerline. R/W means the contour falls within the right-of-way.
Year 2010 Ambient Exterior Noise Exposure
Roadway
A.D.T.a
(Veh/Day)
CNEL @
50 Feetb
Distance to Contours (Ft.)c
70 dBA 65 dBA 60 dBA
Jefferson Street
- N/O Avenue 50
29,510
79.6
396
1249
3949
- N/O Avenue 52
27,150
77.8
262
825
2609
- N/O Avenue 54
27,130
77.2
261
824
2605
PGA Boulevard
- S/O Avenue 54
20,110
70.5
55
157
493
Madison Street
- N/O Avenue 50
9,540
74.7
130
405
1278
- N/O Avenue 52
14,940
76.6
199
626
1979
- N/O Avenue 54
22,450
78.4
301
948
2996
- N/O Airport Boulevard
23,180
78.5
308
970
3066
- N/O Avenue 58
22,810
78.4
301
948
2996
- N/O Resort Village Access
17,250
77.2
229
719
2273
- N/O Avenue 60
17,250
76.6
227
718
2269
- S/0 Avenue 60
17,250
76.6
227
718
2269
Monroe Street
- N/O Avenue 50
19,010
76.3
186
585
1847
- N/O Avenue 52
16,200
77.0
218
687
2170
- N/O Avenue 54
10,060
74.9
136
424
1338
- N/O Airport Boulevard
9,380
74.0
125
394
1247
- N/O Avenue 58
8,050
73.3
106
336
1061
- S/O Avenue 58
4,190
70.5
56
176
557
- N/O Avenue 60
4,190
70.5
56
176
557
- S/O Avenue 60
3,470
69.7
R/W
147
463
- S/O S. Primary Housing Access
3,470
69.7
R/W
147
463
- N/O Avenue 62
3,470
69.7
R/W
147
463
a. A.U.I. = average daily two-way traffic volume.
b. CNEL is provided at 50 feet from all roadway centerlines.
c. All distances are measured from the centerline. R/W means the contour falls within the right-of-way.
Year 2010 Ambient Exterior Noise Exposure (Cont.)
Roadway
A.D.T.a
(Veh/Day)
CNEL @
50 Feetb
Distance to Contours (Ft.)c
70 dBA 65 dBA 60 dBA
Avenue 50
- W/O Jefferson Street
11,080
75.3
149
465
1467
- E/O Jefferson Street
13,890
76.3
186
585
1847
- E/O Madison Street
11,090
75.3
149
465
1467
- E/O Monroe Street
10,740
74.6
143
453
1432
Avenue 52
- W/O Jefferson Street
18,860
76.3
186
585
1847
- E/O Jefferson Street
13,520
76.2
182
571
1805
- E/O Madison Street
10,050
74.9
136
424
1338
- E/O Monroe Street
8,100
73.4
109
343
1086
Avenue 54
- W/O Jefferson Street
200
57.6
R/W
R/W
R/W
- E/O Jefferson Street
11,100
75.3
149
465
1467
- E/O Madison Street
5,150
72.0
73
218
687
- E/O Monroe Street
2,620
68.5
R/W
111
351
Airport Boulevard
- E/O Madison Street
3,570
69.1
R/W
128
404
- E/O Monroe Street
3,940
69.6
R/W
143
453
Avenue 58
- W/O Madison Street
4,030
70.3
54
168
532
- E/O Madison Street
4,970
71.2
66
207
654
- E/O Monroe Street
2,260
67.8
R/W
95
299
Avenue 60
- E/O Madison Street
1,720
66.6
R/W
72
227
- W/O Monroe Street
1,720
66.6
R/W
72
227
- E/O Monroe Street
1,070
64.6
R/W
R/W
143
Avenue 62
- W/O Monroe Street
3,320
69.5
R/W
140
442
- E/O Monroe Street
2,160
67.6
R/W
91
286
a. A.D.T. = average daily two-way traffic volume.
b. CNEL is provided at 50 feet from all roadway centerlines.
c. All distances are measured from the centerline. R/W means the contour falls within the right-of-way.