Texas Reference Marker (TRM) System User’s Manual: Intersecting Roadways

Section 2: Intersecting Roadways

On-System and Off-System Intersections Defined

On-system intersecting roadways consist of an on-system roadway (the Signed Highway) intersecting with another on-system roadway (the Intersecting Signed Highway). TxDOT maintains both of the roadways. Off-system intersecting roadways consist of an on-system roadway (the Signed Highway) intersecting with an off-system roadway.

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Definitions

Channelized Intersection—At-grade single roadbed intersection in which traffic is directed into definite paths by traffic control devices, such as islands, turn lanes, curbs, painted asphalt, or concrete medians; not considered to be a change in the highway design (Roadway Feature value 33, Intersection Type D).

Complement Record—Companion record to every on-system intersection record. Both records must reside in TRM in order for the ARI diagram to display the route intersection correctly.

EXAMPLE: The complement record of SH 100 intersecting with FM 2929 is FM 2929 intersecting with SH 100.

Intersecting Reference Marker Group—Provides the exact reference marker location of the intersection from the perspective of the Intersecting Signed Highway; consists of the Reference Marker Number + Reference Marker Suffix + Reference Marker Displacement:

Number—Official number posted on the Intersecting Signed Highway route. Used together with the other components of the Intersecting Reference Marker Group to locate the exact point of roadway intersection. Determine a valid value by the function
Suffix—Posted suffix character, if any, appended to the intersecting reference marker number on the intersecting signed highway route. Used together with the other components of the intersecting reference marker group to locate the intersection of this route with other routes stored in TRM.
Sign—Symbol indicating the ascending or descending direction of an on-system route intersection from the posted Intersecting Reference Marker Number + Suffix.
Displacement—Distance in miles from the Intersecting Reference Marker + Suffix on the Intersecting Signed Highway route to the intersection with another on-system

Intersecting Roadbed-Id—Identifies which roadbed intersects with another on-system roadway. First character identifies each physically separate roadbed and the second character identifies the elevation of the roadbed. Determine valid values by the function.

Intersecting Signed Highway System—Represents the posted designation approved by the Texas Transportation Commission for an intersecting segment of highway:

Highway—Consists of the Intersecting Signed Highway System + Intersecting Signed Highway Number + Intersecting Signed Highway Suffix
Number—Identification number associated with the Intersecting Signed Highway System
Suffix—Character appended to the Intersecting Signed Highway Number to further partition the number or, in the case of business routes, to indicate geographical routing. Determine valid values from the Intersecting Signed Highway System

Intersection Type (Int Type)—Indicates the type of intersection or interchange.

On-System Intersection—(Roadway Feature value 33) An on-system roadway (the Signed Highway) intersecting with another on-system roadway (the Intersecting Signed Highway). Off-system intersecting route has no Intersecting Signed Highway nor Intersecting Reference Marker location associated with it:

Frontage Road—(Intersecting Feature Type 31) Any frontage road of any roadway designated by the Texas Transportation Commission, listed in the Highway Systems values; Roadbed-Id’s A, B, X, and Y.

Mainlane—(Intersecting Feature Type 11) Any main driving lane of any roadway designated by the Texas Transportation Commission, listed in the Highway Systems values; Roadbed-Id’s K, l, r, M, P, S, T, and N.

Roadway—Any roadway designated by the Texas Transportation Commission, listed in the Highway Systems values; Roadbed-Id’s A, B, C, k, l, m, P, r, s, t, N, X, and Y.

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Input—On-System Intersecting Roadways

Input intersecting roadways according to these two tables for complete TRM documentation. Example: Highway B contains both left and right frontage roads and Highway A completely crosses Highway B; input three transactions:

Anchor: #i1052449Each Roadbed Intersection
Step	Input
1	Highway A crossing the Highway B left frontage roadbed (X)
2	Highway A crossing the Highway B mainlane roadbeds (L + R = N)
3	Highway A crossing the Highway B right frontage roadbed (A)

Then continuing the above example input three more transactions:

Anchor: #i1052465Complement Records for Each Intersection
Step	Input
1	Highway B left frontage road crossing Highway A
2	Highway B mainlane roadbeds crossing Highway A
3	Highway B right frontage road crossing Highway A

Channelized Intersections are the only exception to this rule. These special intersections have only a Signed Highway, not an Intersecting Signed Highway.

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Figure 11-3. On-system intersection. Remember to input the complements!

Follow these input instructions to add intersecting roadway:

Anchor: #i1052481Add On-System Intersection
Step	Action	Input
1	(For instructions to log onto the system, click this link) From the TPP or District Database Maintenance screen, select Update-Code 22H and press <E>; the Point Data screen appears	-
2	Enter Location Key fields	Signed Highway System, Number, and Suffix Reference Marker Number and Suffix, (+) or (–) Sign, and Displacement Roadbed-Id: valid values are K, R, L, M, S, P, T, A, B, X, Y, or N
3	Enter Feature Data fields and press <F2>; the system updates TRM with the new on-system intersection data and displays the message “Transaction completed successfully”	Roadway Feature Value 33 Feature Grade If Grade = U, Int Type = B and input Structure Number If Grade = G, Int Type must = A or D If Grade = D, Int Type must = B Feature Begin/End Feature Skew Quad-Type-Angle Structure Number If mainlane roadbeds share structure number, input one Roadbed-Id N transaction and Skew Quad 1, 2, 3, or 4 If mainlane roadbeds have different structure numbers, input mainlane roadbed transactions for each; input Skew Quad 1 or 2 for the right mainlanes or Skew Quad 3 or 4 for the left mainlanes Intersecting Signed Highway System, Number, and Suffix Intersecting Reference Marker Number and Suffix (+) or (-) Intersecting Reference Marker Sign Intersecting Reference Marker Displacement Intersecting Roadbed-Id: valid values are K, R, L, M, S, P, T, A, B, X, Y, or N Intersecting Feature Type If Int Feature Type = 11, Int Roadbed-Id must = K, R, L, M, S, T, P, or N If Int Feature Type = 31, Int Roadbed-Id must = A, B, X, or Y Intersection Type--If Int Type = D Input Begin/End Grade = G Roadbed-Id = K Int Signed Highway, Int Reference Marker, and Int Roadbed-Id do not apply Notation (optional)
4	To enter other add feature transactions, press <F9> to clean the screen (optional) and repeat the first step To enter another Update-Code, press <F3> to exit back to the TPP/District Database Maintenance Menu To exit back to the TRM Main Menu, press <F10> (For instructions to log off the system, click this link)	-

Follow these input instructions to delete intersecting roadway:

Anchor: #i1052505Delete On-System Intersection
Step	Action	Input
1	(For instructions to log onto the system, click this link) From the TPP or District Database Maintenance screen, select Update-Code 21H and press <E>; the Point Data screen appears	-
2	Input Location Key fields NOTE: The system requires only one delete transaction to delete both the intersection and its complement	Signed Highway System, Number, and Suffix Reference Marker Number and Suffix, (+) or (–) Sign, and Displacement Roadbed-Id
3	Input Feature Data fields and press <F2>; the system retrieves record data from TRM. A prompting message “Press PF2 to confirm or PF 11 to cancel” appears	Roadway Feature value 33 Feature Grade Feature Skew Quad-Type-Angle Int Feature Type
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 Intersecting Roadways	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/District Database Maintenance Menu To exit back to the TRM Main Menu, press <F10> (For instructions to log off the system, click this link)	-

Follow these input instructions to update intersecting roadway location:

Anchor: #i1052533Update On-System Intersection Location
Step	Action	Input
1	(For instructions to log onto the system, click this link) From the TPP or District Database Maintenance screen, select Update-Code 23H and press <E>; the Update Selection Menu appears	-
2	Input an X by Update Attribute Location and press <E>; a prompt message requests the updated feature’s location plus any other required fields the system needs to locate the feature record	-
3	Input Location Key fields; the system retrieves record data from TRM. A prompting message “Enter new Reference-Marker location” appears	Signed Highway System, Number, and Suffix Reference Marker Number and Suffix, (+) or (–) Sign, and Displacement Roadbed-Id
4	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
5	To select Update Attribute Elements, press <F3> to exit back to the Update Selection menu To input another Update-Code, press <F3> twice to exit back to the TPP/District Database Maintenance Menu To exit back to the TRM Main Menu, press <F10> (For instructions to log off the system, click this link)	-

Follow these input instructions to update intersecting roadway attributes:

Anchor: #i1052561Update On-System Intersection Attributes
Step	Action	Input
1	(For instructions to log onto the system, click this link) From the TPP or District Database Maintenance screen, select Update-Code 23H and press <E>; the Update Selection Menu appears	-
2	Input an X by Update Attribute Elements; a prompt message requests the updated feature’s location plus any other required fields the system needs to locate the feature record	-
3	Input Location Key fields	Signed Highway System, Number, and Suffix Reference Marker Number and Suffix, (+) or (–) Sign, and Displacement Roadbed-Id
4	Input Feature Data fields and press <E>; the system retrieves record data from TRM. A prompting message “Enter Updated Attribute Data” appears	Roadway Feature value Feature Grade Feature Skew Quad-Type-Angle Int Feature Type
5	Input update fields and press <F2>; the system updates the feature’s data attributes and the verification message “Transaction completed successfully” appears. The original request for the current attributes to update displays for another update transaction	Feature Grade If Grade = U, Int Type = B and input Structure Number If Grade = G, Int Type must = A or D If Grade = D, Int Type must = B Feature Skew Quad-Type-Angle Structure Number If mainlane roadbeds share structure number, input one Roadbed-Id N transaction and Skew Quad 1, 2, 3, or 4 If mainlane roadbeds have different structure numbers, input mainlane roadbed transactions for each; input Skew Quad 1 or 2 for the right mainlanes or Skew Quad 3 or 4 for the left mainlanes Intersecting Signed Highway System, Number, and Suffix Intersecting Ref Marker Number and Suffix (+) or (–) Intersecting Ref Marker Sign Intersecting Ref Marker Displacement Int Roadbed-Id: valid values are K, R, L, M, S, P, T, A, B, X, Y, or N Intersection Type--If Int Type = D: Input Begin/End Grade = G Roadbed-Id = K Int Signed Highway, Int Reference Marker, and Int Roadbed-Id do not apply Notation (optional)
6	To select Update Attribute Location, press <F3> to exit back to the Update Selection menu To input another Update-Code, press <F3> twice to exit back to the TPP/District 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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Off-System Intersecting Roadways

Because On-System Intersecting roadways intersect with:

Local roads (i.e., county roads, city streets)
Federal lands roads (i.e., Federal parks)
State lands roads (i.e., State parks)
Toll Roads (open to traffic for a fee),

do not input the Intersecting Signed Highway and Intersecting Reference Marker fields. TxDOT maintains only the Signed Highway:

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Figure 11-4. No complements exist in off-system intersections.

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Input—Off-System Intersections

Follow these input instructions to add off-system intersection:

Anchor: #i1052593Add Off-System Intersection
Step	Action	Input
1	(For instructions to log onto the system, click this link) From the TPP or District Database Maintenance screen, select Update-Code 22H and press <E>; the Point Data screen appears	-
2	Enter Location Key fields	Signed Highway System, Number, and Suffix Reference Marker Number and Suffix, (+) or (–) Sign, and Displacement Roadbed-Id: valid values are K, R, L, M, S, P, T, A, B, X, Y, or N
3	Enter Feature Data fields and press <F2>; the system updates TRM with the new off-system intersection data and displays the message “Transaction completed successfully”	Roadway Feature Value 33 Feature Grade If Grade = U, Int Type must = B; input Structure Number If Grade = G, Int Type must = A If Grade = D, Int Type must = B Feature Begin/End Feature Skew Quad-Type-Angle Structure Number If mainlane roadbeds share structure number, input one Roadbed-Id N transaction and Skew Quad 1, 2, 3, or 4 If mainlane roadbeds have different structure numbers, input mainlane roadbed transactions for each; input Skew Quad 1 or 2 for the right mainlanes or Skew Quad 3 or 4 for the left mainlanes Intersecting Feature Type—Valid codes are 21, 41, 51, 61 Intersection Type: If Int Type = D Input Roadway Feature Begin/End Roadway Feature Grade must = G Roadbed-Id must = K Notation (optional)
4	To enter other add feature transactions, press <F9> to clean the screen (optional) and repeat the first step To enter another Update-Code, press <F3> to exit back to the TPP/District Database Maintenance Menu To exit back to the TRM Main Menu, press <F10> (For instructions to log off the system, click this link)	-

Follow these input instructions to delete off-system intersection:

Anchor: #i1052617Delete Off-System Intersection
Step	Action	Input
1	(For instructions to log onto the system, click this link) From the TPP or District Database Maintenance screen, select Update-Code 21H and press <E>. Result: The Point Data screen appears	-
2	Input Location Key fields	Signed Highway System, Number, and Suffix Reference Marker Number and Suffix, (+) or (–) Sign, and Displacement Roadbed-Id
3	Input Feature Data fields and press <F2>; the system retrieves record data from TRM. A prompting message “Press PF2 to confirm or PF 11 to cancel” appears	Roadway Feature value Feature Grade Feature Skew Quad-Type-Angle Int Feature Type
4	Repress <F2> to confirm deletion; the system displays the verification message “Transaction completed successfully” and deletes all data records associated with the deleted Off-System Intersecting Roadways	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/District Database Maintenance Menu To exit back to the TRM Main Menu, press <F10> (For instructions to log off the system, click this link)	-

Follow these input instructions to update off-system intersection location:

Anchor: #i1052645Update Off-System Intersection Location
Step	Action	Input
1	(For instructions to log onto the system, click this link) From the TPP or District Database Maintenance screen, select Update-Code 23H and press <E>; the Update Selection Menu appears	-
2	Input an X by Update Attribute Location and press <E>; a prompt message requests the updated feature’s location plus any other required fields the system needs to locate the feature record	-
3	Input Location Key fields; the system retrieves record data from TRM. A prompting message “Enter new Reference-Marker location” appears	Signed Highway System, Number, and Suffix Reference Marker Number and Suffix, (+) or (–) Sign, and Displacement Roadbed-Id
4	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
5	To select Update Attribute Elements, press <F3> to exit back to the Update Selection menu To input another Update-Code, press <F3> twice to exit back to the TPP/District Database Maintenance Menu To exit back to the TRM Main Menu, press <F10> (For instructions to log off the system, click this link)	-

Follow these input instructions to update off-system intersection attributes:

Anchor: #i1052673Update Off-System Intersection Attributes
Step	Action	Input
1	(For instructions to log onto the system, click this link) From the TPP or District Database Maintenance screen, select Update-Code 23H and press <E>; the Update Selection Menu appears	-
2	Input an X by Update Attribute Elements and press <E>; a prompt message requests the updated attribute’s location plus any other required fields the system needs to locate the feature record	-
3	Input Location Key fields	Signed Highway System, Number, and Suffix Reference Marker Number and Suffix, (+) or (–) Sign, and Displacement Roadbed-Id
4	Input Feature Data fields and press <E>; the system retrieves record data from TRM. A prompting message “Enter Updated Attribute Data” appears	Roadway Feature value Feature Grade Feature Skew Quad-Type-Angle Int Feature Type
5	Input update fields and press <F2>; the system updates the feature’s data attributes and the verification message “Transaction completed successfully” appears. The original request for the current attributes to update displays for another update transaction	Feature Grade If update Grade to = U, Int Type must = B; input Structure Number If Grade = G, Int Type must = A If update Grade to = D, Int Type must = B Feature Skew Quad-Type-Angle Structure Number If mainlane roadbeds share structure number, input one Roadbed-Id N transaction and Skew Quad 1, 2, 3, or 4 If mainlane roadbeds have different structure numbers, input mainlane roadbed transactions for each; input Skew Quad 1 or 2 for the right mainlanes or Skew Quad 3 or 4 for the left mainlanes Intersection Type: If Int Type = D Input Feature Begin/End Feature Grade must = G Roadbed-Id must = K Notation (optional)
6	To select Update Attribute Location, press <F3> to exit back to the Update Selection menu To input another Update-Code, press <F3> twice to exit back to the TPP/District Database Maintenance Menu To exit back to the TRM Main Menu, press <F10> (For instructions to log off the system, click this link)	-