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Indications and Rules for Enhanced NEC Signals |
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|
A |
B |
C |
Name |
Indication |
Speed |
 |
 |
 |
CLEAR |
Proceed at normal track speed. |
Normal Speed |
 |
APPROACH LIMITED |
Proceed approaching next signal at Limited Speed. |
45 MPH |
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 |
LIMITED CLEAR |
Proceed onto diverging route at Limited Speed, then Normal Speed. |
45 MPH |
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 |
APPROACH MEDIUM |
Proceed approaching next signal at Medium Speed. |
30 MPH |
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 |
 |
 |
ADVANCE APPROACH |
Proceed prepared to stop at 2nd signal. Limited Speed. |
45 MPH |
 |
MEDIUM CLEAR |
Proceed onto diverging route at Medium Speed, then Normal Speed. |
30 MPH |
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 |
 |
 |
APPROACH |
Preceed prepared to Stop at next Signal. Medium Speed. |
30 MPH |
 |
MEDIUM APPROACH |
Proceed onto diverging route at Medium Speed prepared to Stop at next signal. |
30 MPH |
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 |
RESTRICTING |
Proceed at Restricted Speed prepared to Stop. |
15 MPH |
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 |
 |
STOP AND PROCEED |
Stop, then proceed at Restrictied Speed. |
15 MPH |
|
 |
STOP |
Stop. |
0 MPH |
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|
A |
Interlocking or Junction Signal. Indictions are absolute. | ||||
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B |
Distant Signal. Preceeds Interlocking Signals. Indications are permissive. | ||||
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C |
Interval or Automatic Block Signal. Indications are permissive. | ||||
| Copyright ©2001, Henry J Sundermeyer | |||||