Norfolk Southern/Conrail Rail Connection–Bucyrus, Ohio - Surface ...

Event Speed Duratio
Time (mph) n (sec)
Table N-2
Noise Data from NS Trains on a 0.9 Percent Grade
No. of No. of Directio
Loco- Rail n of
motives Cars Travel
Measured Leq at Distance from
Tracks (dBA)
50 ft 100 ft 150 ft 180 ft
1019 30 120 1 95 -- 80.2 78.1 76.0 75.8
1226 53 70 3 44 -- 76.8 75.5 73.1 73.0
1257 48 50 2 42 -- 79.0 78.7 76.0 75.4
1315 27 166 3 59 -- 78.3 76.7 74.6 73.9
1406 33 106 2 59 uphill 78.9 77.7 75.9 77.2
1636 31 161 3 87 uphill 81.3 80.3 76.9 77.2
1450 43 72 3 70 downhill 80.0 77.5 75.4 75.5
1722 42 164 2 132 downhill 79.6 77.6 74.9 74.6
Table N-3
Horn Noise Data from NS Trains
(all measurements taken 150 ft from track centerline)
Time Direction L eq (dBA) L max (dBA) SEL (dBA)
Duration
(seconds)
1030 South 93.0 99.0 105.0 16.0
1049 North 91.5 99.5 103.5 15.7
1222 South 92.0 101.0 104.0 16.0
1238 North 94.7 100.9 107.0 17.0
1304 South 91.2 96.6 101.1 9.3
1400 South 95.4 102.3 108.3 19.6
Table N-4
Average Values Calculated from NS Train Noise Data
(all sound levels normalized to 100 ft from track centerline)
Energy Average
Source
# of Sound Level, dBA
Trains Noise Average
Metric Level
Train Horns 6 SEL 108
Train Passby on level track, 20 mph (no
horn)
Train Passby on level track, 35 mph (no
horn)
Train Passby on level track, 50 mph (no
horn)
Train Passby up 0.9% grade, 31 mph (no
horn)
Train Passby down 0.9% grade, 45 mph
(no horn)
L 103
max
L 96
eq
12 L 75
eq
12 L 78
eq
12 L 82
eq
2 L 79
eq
2 L 78
eq
The NS noise model was based on SEL and L levels measured in the field at different speeds, train
dn
lengths, numbers of locomotives, different grades, and train horns.
D-27