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Section 2: Baseline Bearing Data

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Baseline Bearing Defined

The Baseline Bearing documents the compass heading of each straight route segment and the relative location of the baseline used to derive directions and measurements.

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Definitions

Baseline Bearing Degrees—Degree measurement of the variance of the baseline alignment of the highway from its North or South heading, determined by field survey.

Bearing Beginning Direction—Primary direction, North or South, of the baseline alignment of a highway determined by field survey.

Bearing Ending Direction—Direction, east or west, in which the baseline alignment of a highway varies from a north or south heading, determined by field survey; last direction specified.

Bearing Location—An eight character text field used to identify the actual location of the highway baseline:

Anchor: #i1008471Baseline Bearing Location Examples

Value

Location

HWY CL

Highway Centerline

CL Lt Ln

Centerline of left lane

50F Rt

50 feet right of centerline

EP RL

Edge of Pavement, right lane

CL RBL

Centerline of Roadbed L

50 RT

50 feet right of centerline

LT ROW

Left right of way


Bearing Minutes—Whole minute measurement of the difference between actual direction and primary direction of the baseline bearing.

Bearing Seconds—Seconds measurement, to one decimal place, of the variance of the baseline alignment of a highway from its north or south heading, determined by field survey.

Bearing Type—Indicates the type of baseline information recorded on the highway segment:

Anchor: #i1008499Baseline Bearing Type Values

Value

Bearing Type

1

Baseline Bearing (normal)

2

EQ-Baseline Bearing back

3

EQ-Baseline Bearing forward

4

Highway Baseline location


Bearing Equations—Those points on the highway centerline at which it is necessary to make one station number equal to another station number:

Bearing Back—Direction or compass heading up to a baseline bearing equation.

Bearing Forward—Direction or compass heading from a baseline bearing equation forward.

Note: Bearings print on the ARI from location point forward, so the form reference marker location should be at the beginning of a clear area (i.e., free of attributes) on the ARI diagram. Add Both EQ‑Baseline Bearing Back [Type 2] and EQ‑Baseline Bearing Forward [Type 3] at the same location

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Input—Baseline Bearing

Follow these input instructions to add baseline bearing

Anchor: #i1008518Add Baseline Bearing

Step

Action

Input

1

(For instructions to log onto the system, click this link)

From the TPP Database Maintenance Menu, select Update-Code 12H and press <E>; the TPP Database Maintenance Submenu appears

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2

Input an X by Baseline Bearing and press <E>; the Baseline Bearing Data screen appears

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3

Input Location fields

4

Input remaining fields and press <F2>; the system updates TRM with the new route information and displays the message “Transaction completed successfully”

  • Bearing Type
  • Bearing Beginning Direction, N (North) or S (South)
  • Bearing Degrees, whole degrees of compass bearing values 00 to 99
  • Bearing Minutes, whole minutes of compass bearing values 00 to 59
  • Bearing Seconds, seconds of compass bearing, to one decimal values 00 to 59.9
  • Bearing Ending Direction, E (East) or W (West)
  • Bearing Location (required for Bearing Type 4 only)

5
  • To select PI, Normal, or Spiral Curve additions, press <F3> to exit back to the TPP Maintenance Submenu
  • To input another Update-Code, press <F3> twice 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)

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Follow these input instructions to delete baseline bearing:

Anchor: #i1008546Delete Baseline Bearing

Step

Action

Input

1

(For instructions to log onto the system, click this link)

From the TPP Database Maintenance Menu, select Update-Code 11H and press <E>; the TPP Database Maintenance Submenu displays

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2

Input an X by Baseline Bearing and press <E>; the Baseline Bearing Data screen displays

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3

Input Location Key fields

  • Signed Highway System, Number, and Suffix
  • Reference Marker Number and Suffix, (+) or (–) Sign, and Displacement

4

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

Bearing Type

5

Repress <F2> to confirm deletion; the system displays the verification message “Transaction completed successfully” and deletes all data records associated with the deleted baseline bearing attributes

OR Press <F11> to cancel deletion; the system takes no action

6
  • To select PI, Normal, or Spiral Curve deletions, press <F3> to exit back to the TPP Maintenance Submenu
  • To input another Update-Code, press <F3> twice 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)

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Follow these input instructions to update baseline bearing location:

Anchor: #i1008578Update Baseline Bearing Location

Step

Action

Input

1

(For instructions to log onto the system, click this link)

From the TPP Database Maintenance Menu, select Update-Code 13H and press <E>; the TPP Database Maintenance Submenu appears

  • Update either the location of the bearing or the data attributes associated with the bearing. If updating both, input two transactions
  • Do not update if the Signed Highway is incorrect; delete and re-enter the bearing record

2

Input an X by Baseline Bearing and press <E>; the Update Selection Menu appears

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3

Input an X by Update Location and press <E>; the Baseline Bearing Data appears and a prompt message requests the updated attribute’s location plus any other required fields the system needs to locate the attribute record

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4

Input Location Key fields

  • Signed Highway System, Number, and Suffix
  • Reference Marker Number and Suffix, (+) or (–) Sign, and Displacement

5

Input remaining fields and press <E>; the system retrieves record data from TRM. A prompting message “Enter new Reference-Marker location” appears

Bearing Type

6

Input update fields and press <F2>; the system updates the location and the verification message “Transaction completed successfully” appears. The original request for the current location to update displays for another update transaction

Reference Marker Number and Suffix and/or Reference Marker Sign (+) or (–) and Displacement

7
  • To select Update Attribute Elements, press <F3> to exit back to the Update Selection menu
  • To select Normal, PI, or Spiral Curve, press <F3> twice to exit back to the TPP Maintenance Submenu
  • To input another Update-Code, press <F3> three times 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)

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Follow these input instructions to update baseline bearing attributes:

Anchor: #i1008614Update Baseline Bearing Attributes

Step

Action

Input

1

(For instructions to log onto the system, click this link)

From the TPP Database Maintenance Menu, select Update-Code 13H and press <E>; the TPP Database Maintenance Submenu appears

  • Update either the location of the bearing or the data attributes associated with the bearing. If updating both, input two transactions
  • Do not update if the Signed Highway is incorrect; delete and re-enter the bearing record

2

Input an X by Baseline Bearing and press <E>; the Update Selection Menu appears

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3

Input an X by Update Elements and press <E>; the Baseline Bearing Data screen appears and a prompt message requests the updated attribute’s location plus any other required fields the system needs to locate the attribute record

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4

Input Location Key fields

  • Signed Highway System, Number, and Suffix
  • Reference Marker Number and Suffix, (+) or (–) Sign, and Displacement

5

Input the remaining fields and press <E>; the system retrieves record data from TRM. A prompting message “Enter Updated Attribute Data” appears

Bearing Type

6

Input update fields and press <F2>; the system updates the attribute and the verification message “Transaction completed successfully” appears. The original request for the current attributes to update displays for another update transaction

  • Bearing Type
  • Bearing Beginning Direction (N or S)
  • Bearing Degrees, whole degrees of compass bearing values 00 to 99
  • Bearing Minutes, whole minutes of compass bearing values 00 to 59
  • Bearing Seconds, seconds of compass bearing, to one decimal values 00 to 59.9
  • Bearing Ending Direction (E or W)
  • Bearing Location (required for Bearing Type 4 only)

7
  • To select Update Attribute Location, press <F3> to exit back to the Update Selection menu
  • To select Normal, PI, or Spiral Curve, press <F3> twice to exit back to the TPP Maintenance Submenu
  • To input another Update-Code, press <F3> three times 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)

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