Section 3: On-System Link Segments
Anchor: #i1011620On-System Link Defined
Highway B’s designation stops at its intersection with Highway A and resumes from a second intersection with Highway A, creating an on-system link. On-System links exist only at roadway gap locations on the interrupted route. Add, update, or delete linked route segments like other point data (because they are stored as point data):
- Mileage within the linked segment determines Distance From Origin and Distance Between Markers for both the interrupted and continuous routes
- The system includes this mileage with the continuous route, but removes it from the interrupted route for Federal mileage reports
- The system does not carry the designation of the on-system link on the linked segment. On-System links have no route hierarchy.
-
EXAMPLE: In Figure 9‑6, Highway B interrupts data for Highway A. The roadway segment with B does not carry a designation for A:
-
Figure 9-6. Linking section of Highways A and B shaded.
-
EXAMPLE: In Figure 9‑7, Highway A is the “interrupted route”, entered as the Signed Highway. Highway B is the “continuous route”, entered as the Link Signed Highway. The shaded area is the linked section for both routes:
-
Figure 9-7. Linking section of Highways B and A shaded.
Input—On-System Link
Follow these input instructions to add on-system link:
|
Step |
Action |
Input |
|---|---|---|
| 1 |
(For instructions to log onto the system, click this link) From the TPP Database Maintenance Menu, select Update-Code 32I and press <E>; the Network Change Data screen appears |
- |
| 2 |
Input Location Key fields |
|
| 3 |
Input remaining fields and press <F2>; a prompting message requests confirmation to add the link and displays the message “Transaction completed successfully” |
|
| 4 |
To input another Update-Code, press <F3> to exit back to the TPP Database Maintenance Menu To exit back to the TRM Main Menu, press <F10> (For instructions to log off the system, click this link) |
System Response. While adding the new link, the TRM system automatically:
- Removes the gap record located in the TRM-Feature file for the interrupted route
- Increases the:
-
- mileage of the interrupted route by the length of the on-system segment
- distance from origin for all markers succeeding the new segment by the length of the new segment
- distance between markers for the closest succeeding marker by the length of the new segment
- Creates records in TRM for the begin and end points of the link.
Follow these input instructions to delete on-system link:
|
Step |
Action |
Input |
|---|---|---|
|
1 |
(For instructions to log onto the system, click this link) From the TPP Database Maintenance Menu, select Update-Code 31I and press <E>; the Network Change Data screen appears |
- |
|
2 |
Input Location Key fields |
|
|
3 |
Input remaining fields and press <F2>; the system retrieves record data from TRM. A prompting message “Press PF2 to confirm or PF 11 to cancel” appears |
|
|
4 |
Repress <F2> to confirm deletion; the system displays the verification message “Transaction completed successfully” and deletes all data records associated with the deleted on-system links |
OR Press <F11> to cancel deletion; the system takes no action |
|
5 |
To input another Update-Code, press <F3> to exit back to the TPP Database Maintenance Menu To exit back to the TRM Main Menu, press <F10> (For instructions to log off the system, click this link) |
System Response. While deleting the on-system link, the TRM system automatically:
- Creates a gap record in the TRM-FEATURE file within the Signed Highway at the marker location of what was the beginning of the link
- Decreases the:
-
- mileage of the interrupted route by the length of the link segment
- distance from origin for all markers succeeding the new segment by the length of the new segment
- distance between markers for the closest succeeding marker by the length of the new segment
- Removes records in TRM for the begin and end points of the link for both routes.
Follow these input instructions to update on-system link:
|
Step |
Action |
Input |
|---|---|---|
| 1 |
(For instructions to log onto the system, click this link) From the TPP Database Maintenance Menu, select Update-Code 33I and press <E>; the Network Change Data screen appears and a prompt message requests the updated link’s begin and end location points (From and To) location plus any other required fields the system needs to locate the feature record |
Delete and re-enter the link if the Signed Highway fields, Link Signed Highway fields, or the Link Type Code is incorrect |
| 2 |
Input Location Key fields |
|
| 3 |
Input remaining fields and press <E>; the system retrieves record data from TRM. A prompting message “Enter Updated Link Data” appears |
|
| 4 |
Input requested fields and press <F2>; the system updates the link and the verification message “Transaction completed successfully” appears. The original request for the current link update displays for another update transaction |
|
| 5 |
To input another Update-Code, press <F3> to exit back to the TPP Database Maintenance Menu To exit back to the TRM Main Menu, press <F10> (For instructions to log off the system, click this link) |
System Response. While updating the on-system link, the TRM system automatically updates the existing records in TRM with the modified values - either a new Link Type or Notation.