Exchange Requirement: Corridor
Name
Corridor
Identifier
er_corridor
Change Log
| Date (yyyy-mm-dd) | Action | Author (email) |
|---|---|---|
| 2025-12-09 | Initial draft | AI Generated |
Project Stage
Select the applicable project stage(s); remove rows that do not apply.
| Code | Stage |
|---|---|
| 0 | Portfolio requirements |
| 1 | Conception of need |
| 2 | Outline feasibility |
| 3 | Substantive feasibility |
| 4 | Outline conceptual design |
| 5 | Full conceptual design |
| 6 | Coordinated design and procurement |
| 7 | Production information |
| 8 | Construction |
| 9 | Operation and maintenance |
| 10 | Disposal |
Overview
Provide a textual overview of the exchange requirement under the headings Scope, General Description and Information Description. Keep it non-technical and aimed at an executive audience.
Scope
The scope of this exchange requirement is to enable the exchange of corridor geometry including width definitions, stationing information, and the hierarchical composition of lanes and shoulders that form the traveled way.
General Description
A corridor represents the three-dimensional volume that defines the roadway traveled way, typically extending from centerline to edge-of-pavement and along the alignment. This exchange requirement captures the corridor’s geometric boundaries, component lanes and shoulders, and the station-based extents that define where the corridor begins and ends. The information model supports both simple corridors (single cross-section) and complex corridors with variable width and multiple cross-sections.
Information Description
The information exchanged through this requirement includes the following parts:
- Corridor Information
- Corridor Width
- Corridor Stations
- Super Elevation Controls
- Lane Information
- Lane Offsets
- Lane Slopes
- Shoulder Information
- Shoulder Offsets
- Shoulder Slopes
Information Requirements
Preconditions
Before exchanging corridor information, the following information must be available: Horizontal and vertical alignments must be established (see Exchange Requirement: Horizontal Alignment, Exchange Requirement: Vertical Alignment). Project coordinate system must be defined. Lane and shoulder configuration must be determined.
Parts
A part is a set of information that achieves a specific purpose or function within this exchange requirement (for example: Select Object, Assign To Group, Associate Library Reference). An exchange requirement is expected to consist of many parts.
Repeat the following block for each part.
Part: Corridor Information
- Purpose: Define the basic composition of the corridor including lane count, shoulder count, and unique identification for template application and cross-section management.
Concept: Corridor Composition
- Purpose: Establish the fundamental corridor configuration to support typical section application and roadway design.
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Corridor Section ID | Unique identification of the corridor section or template for placement of road sections and other roadside components. (Type: STRING, Cardinality: R) |
| Number of Shoulders | Total count of individual shoulders on a roadway (Type: INTEGER, Cardinality: R) |
| Number of Lanes | Total count of individual lanes designated for vehicular traffic on a roadway (Type: INTEGER, Cardinality: R) |
Part: Corridor Width
- Purpose: Specify the various width measurements that define corridor boundaries including traveled way width, out-to-out dimensions, right-of-way limits, and clear zone requirements for design coordination and safety compliance.
Concept: Corridor Dimensional Control
- Purpose: Define all critical width dimensions from edge-of-pavement to right-of-way to ensure proper coordination between roadway, safety, and right-of-way design elements.
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Total Width of Roadway | Refers to the total width of a roadway typically includes all the lanes, shoulders, and any other designated areas for vehicles. (Type: REAL, Units: Feet, Cardinality: R) |
| Out to Out Width | Refers to the total width of a structure or roadway, measured from the outermost edge on one side to the outermost edge on the other side. This measurement includes all elements of the structure, such as lanes, shoulders, barriers, and any other features that extend to the outer edges. Essentially, it captures the full width of the structure or roadway as it spans from one side to the other (Type: REAL, Units: Feet, Cardinality: O) |
| Limits of Construction | Boundary that designates specific area for construction activities. (Type: REAL, Units: Feet, Cardinality: O) |
| ROW to ROW Width | Refers to distances between ROW lines along a roadway corridor. (Type: REAL, Units: Feet, Cardinality: O) |
| Clear Zone Width | The roadside border area, starting at the edge of the traveled way, available for safe use by errant vehicles. This area may consist of a shoulder, recoverable slope, nonrecoverable slope, clear runout area, or combination thereof. Although it is desirable to maximize the available clear zone, minimum width requirements are dependent on the traffic volumes and speeds and on the roadside geometry. (Type: REAL, Units: Feet, Cardinality: O) |
Part: Corridor Stations
- Purpose: Define the station range (begin and end stationing) where the corridor template applies along the alignment for accurate section placement and construction limits.
Concept: Corridor Extents
- Purpose: Establish the longitudinal limits of corridor application to support typical section transitions and construction phasing.
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Corridor Station Range Start | refers to the start of a specific segment or section of a roadway or project that is defined by two station points (Type: REAL, Units: Stationing, Cardinality: R) |
| Corridor Station Range End | refers to a specific segment or section of a roadway or project that is defined by two station points (Type: REAL, Units: Stationing, Cardinality: R) |
Part: Super Elevation Controls
- Purpose: Describe the purpose of the Super Elevation Controls part
Concept: Super Elevation Controls Information
- Purpose: Describe the purpose of capturing Super Elevation Controls information
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Point of Rotation to Right Edge of Roadway | The horizontal measurement from the Horizontal Control Line to the Right Edge to determine the lateral position of the right edge of the roadway from the Horizontal Control Line . (Type: REAL, Units: Feet, Cardinality: R) |
| Left Edge of Roadway to Point of Rotation | The horizontal measurement from the Left Edge to the Horizontal Control Line to determine the lateral position of the Horizontal Control Line from the left edge of the roadway. (Type: REAL, Units: Feet, Cardinality: R) |
| Point of Rotation to Horizontal Control Line | The measurement from the Horizontal Control Line to Point of Rotation. (Type: REAL, Units: Feet, Cardinality: R) |
| Left Edge of Roadway to Theoretical Grade Line | The horizontal measurement from the Left Edge to the Theoretical Grade Line to determine the lateral position of the Theoretical Grade Line from the left edge of the roadway. (Type: REAL, Units: Feet, Cardinality: R) |
| Theoretical Grade Line to Right Edge of Roadway | The horizontal measurement from the Theoretical Grade Line to the Right Edge to determine the lateral position of the right edge of the roadway from the Theoretical Grade Line. (Type: REAL, Units: Feet, Cardinality: R) |
Part: Lane Information
- Purpose: Describe the purpose of the Lane Information part
Concept: Lane Information Information
- Purpose: Describe the purpose of capturing Lane Information information
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Lane Width | The width allocated to a single lane of travel for vehicles or shoulder (Type: REAL, Units: Feet, Cardinality: R) |
| Lane Use | Utilization of lane including travel, auxiliary, turn, merge, parking, etc. (Type: STRING, Cardinality: R) |
Part: Lane Offsets
- Purpose: Describe the purpose of the Lane Offsets part
Concept: Lane Offsets Information
- Purpose: Describe the purpose of capturing Lane Offsets information
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Centerline Offset from Horizontal Control Line | The measurement between the central axis of the roadway and a predefined reference line. (Type: REAL, Units: Feet, Cardinality: R) |
| Crown Offset from Horizontal Control Line | The measurement between the high point of a normal cross slope |
| of a roadway and a predefined reference line. (Type: REAL, Units: Feet, Cardinality: O) | |
| Point of Rotation from Horizontal Control Line | The measurement from the point where the cross slope changes to a predefined reference line. (Type: REAL, Units: Feet, Cardinality: O) |
| Theoretical Grade Line from Horizontal Control Line | The measurement from the designed profile line to a predefined reference line. (Type: REAL, Units: Feet, Cardinality: O) |
Part: Lane Slopes
- Purpose: Describe the purpose of the Lane Slopes part
Concept: Lane Slopes Information
- Purpose: Describe the purpose of capturing Lane Slopes information
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Distance to End of Slope Transition | The horizontal measurement from the point where the grade starts to change to its conclusion. (Type: REAL, Units: Feet, Cardinality: O) |
| Rate of Change of Slope | The algebraic difference of grade per unit of distance. (Type: REAL, Cardinality: O) |
| Horizontal Width of Slope | The distance from the start of the grade transition to the end of grade transition measured in a level plane. (Type: REAL, Units: Feet, Cardinality: O) |
| Start of Slope Transition | The point where the grade starts to change from one grade to another. (Type: REAL, Units: Stationing, Cardinality: O) |
| Slope | The transverse slope and/or superelevation described by the roadway section geometry. (Type: REAL, Cardinality: R) |
Part: Shoulder Information
- Purpose: Describe the purpose of the Shoulder Information part
Concept: Shoulder Information Information
- Purpose: Describe the purpose of capturing Shoulder Information information
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Shoulder Width | The width allocated to a single lane of travel for vehicles or shoulder (Type: REAL, Units: Feet, Cardinality: R) |
| Shoulder Use | Utilization of lane including travel, auxiliary, turn, merge, parking, etc. (Type: STRING, Cardinality: R) |
Part: Shoulder Offsets
- Purpose: Describe the purpose of the Shoulder Offsets part
Concept: Shoulder Offsets Information
- Purpose: Describe the purpose of capturing Shoulder Offsets information
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Centerline Offset from Horizontal Control Line | The measurement between the central axis of the roadway and a predefined reference line. (Type: REAL, Units: Feet, Cardinality: R) |
| Crown Offset from Horizontal Control Line | The measurement between the high point of a normal cross slope |
| of a roadway and a predefined reference line. (Type: REAL, Units: Feet, Cardinality: O) | |
| Point of Rotation from Horizontal Control Line | The measurement from the point where the cross slope changes to a predefined reference line. (Type: REAL, Units: Feet, Cardinality: O) |
| Theoretical Grade Line from Horizontal Control Line | The measurement from the designed profile line to a predefined reference line. (Type: REAL, Units: Feet, Cardinality: O) |
Part: Shoulder Slopes
- Purpose: Describe the purpose of the Shoulder Slopes part
Concept: Shoulder Slopes Information
- Purpose: Describe the purpose of capturing Shoulder Slopes information
Provide a table with the set of information requirements for each concept. Extend the table as needed.
| Idea | Explanation |
|---|---|
| Distance to End of Slope Transition | The horizontal measurement from the point where the grade starts to change to its conclusion. (Type: REAL, Units: Feet, Cardinality: O) |
| Rate of Change of Slope | The algebraic difference of grade per unit of distance. (Type: REAL, Cardinality: O) |
| Horizontal Width of Slope | The distance from the start of the grade transition to the end of grade transition measured in a level plane. (Type: REAL, Units: Feet, Cardinality: O) |
| Start of Slope Transition | The point where the grade starts to change from one grade to another. (Type: REAL, Units: Stationing, Cardinality: O) |
| Slope | The transverse slope and/or superelevation described by the roadway section geometry. (Type: REAL, Cardinality: R) |