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Whistle Board Specifications
WHISTLE BOARDS:
.080 aluminum.
BOLT HOLES:
3/8 inches in diameter.
FACING:
White engineer grade reflective sheeting.
LETTERS:
Black in a Helvetica letterstyle.
POST:
Standard galvanized steel U-channel sign post or concrete.
PLACEMENT:
Engineers' side of the track which is generally the right side.
Right angles to the direction of the track and at the eye level of the
engineer, sitting in the locomotive cab.
At least 10 feet from the center line of the track, outside of the ballast,
and seen easily by the engineer. However, the whistle board should not
present an obstruction to crew members or cargo on the train.
Placement should be varied in situations where variation will aid train
engineers.
Figure 3-14B. Whistle board specifications.
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