Norfolk Southern Signal Aspects

Name: Clear - Rule 281
Indication: Proceed at prescribed speed.
High Signal: Vertical Green
Green over red over red
Green over red
Green
Dwarf: Green over red
Green over number plate

Name: Approach Diverging - Rule 282
Indication: Proceed preparing to take diverging route beyond next signal at prescribed speed.
High Signal: Diagonal Yellow over Vertical Yellow
Yellow over Green over Red
Yellow over Green
Dwarf: Yellow over Green

Name: Advance Approach - Rule 282-A
Indication: Proceed preparing to stop at second signal.
High Signal: Diagonal Yellow over Diagonal Yellow
Yellow over Yellow over Red
Yellow over Yellow
Dwarf: Yellow over Yellow

Name: Diverging Clear - Rule 283
Indication: Proceed through turnout or turnouts at prescribed speed.
High Signal: Horizontal Red over Vertical Yellow
Red over Green over Red
Red over Green
Lunar White over Green
Dwarf: Red over Green
Lunar White over Green

Name: Diverging Approach Diverging - Rule 283-B
Indication: Proceed through turnout or turnouts at prescribed speed preparing to take Diverging route beyond next signal at prescribed speed.
High Signal: Horizontal Red over Diagonal Yellow (flashing)
Red over flashing Yellow over Red
Lunar White over flashing Yellow
Dwarf: Lunar White over flashing Yellow

Name: Approach - Rule 285
Indication: Proceed preparing to stop at next signal. Train or engine exceeding Medium Speed must at once reduce to that speed.
High Signal: Diagonal Yellow
Yellow over Red over Red
Yellow over Red
Yellow
Dwarf: Yellow over number plate

Name: Approach Distant - Rule 285-A
Indication: Proceed preparing to stop at next home signal. Train or engine exceeding Medium Speed must at once reduce to that speed.
Note: Signal DOES NOT afford automatic block protection.
High Signal: Diagonal Yellow over plate showing letter "D"
Yellow over plate showing letter "D"
Yellow with Forked End blade

Name: Diverging Approach - Rule 286
Indication: Proceed through turnout or turnouts at prescribed speed preparing to stop at next signal. Train or engine exceeding Medium Speed must at once reduce to that speed.
High Signal: Horizontal Red over Diagonal Yellow
Red over Yellow over Red
Lunar White over Yellow
Dwarf: Lunar White over Yellow

Name: Slow Clear
Indication: Proceed; Slow Speed within interlocking limits or through turnout Or turnouts.
Note: Slow Speed applies until leading end of movement reaches opposing home Signal when route is lined for straight track movement. Slow Speed applies for entire movement through turnout or turnouts.
High Signal: Red over Red over Green
Low Green
Dwarf: Green over Red

Name: Slow Approach - Rule 288
Indication: Proceed preparing to stop at next signal; Slow Speed within interlocking Limits or through turnout or turnouts.
Note: Slow Speed applies until leading end of movement reaches opposing home Signal when route is lined for straight track movement. Slow Speed applies for entire movement through turnout or turnouts.
High Signal: Yellow over Red
Yellow over Red diagonal
Low flashing Yellow

Name: Restricting - Rule 290
Indication: Proceed at Restricted Speed.
High Signal: Horizontal Red over Diagonal Yellow (Reversed)
Horizontal Red over number plate
Red over number plate
Red over Red over Yellow
Red over Yellow
Dwarf: Red over number plate
Horizontal red over number plate
Yellow over Red Diagonal (Reversed)
Red over Yellow
Yellow

Name: Stop - Rule 292
Indication: Stop.
High Signal: Horizontal Red over Red
Red over Red over Red
Red over Red
Red
Dwarf: Red Horizontal
Red over Red
Red

Speed:
Medium Speed - A speed not exceeding 30 MPH.
Reduced Speed - A speed that will permit complying with flagging signals and stopping short of train or obstruction.
Restricted Speed - A speed that will permit stopping short of train, engine, obstruction,
                or switch not properly lined and looking out for broken rail, but not exceeding 15 MPH.
Slow Speed - A speed not exceeding 15 MPH.
Yard Speed - A speed that will permit stopping within on-half the range of vision.