Multi-Corridor Roadway Network & Skewed Intersection

Project Overview

Designed an at-grade road intersection from two intersecting alignments, modeling the full corridor transition and surface tie-ins across variable terrain. The main focus was structuring multi-baseline corridor regions, applying curb return target mapping, and ensuring continuous crown and cross-slope geometry through the intersection node. Using Civil 3D subassemblies and target controls, the workflow translated raw alignment intersections into cohesive 3D surface models and production-ready layout viewports.

Key Challenges and Technical Solutions

Challenge: Non-Perpendicular Alignment Skew

Solution: Configured multi-baseline corridor regions and assigned custom curb return alignments/profiles. Used horizontal width and vertical elevation targets along curb returns to ensure smooth, natural pavement transitions through the skewed quadrants.

Challenge: Primary Crown and Secondary Elevation Tie-Ins

Solution: Maintained the primary roadway’s continuous crown profile through the intersection while dynamically matching the secondary roadway approach grades to the edge of the primary lane, preventing abrupt grade breaks and drainage pockets.

Challenge: Terrain Daylighting and Surface Integration

Solution: Applied subassembly daylighting targeted to the Existing Ground (EG) surface across varying side slopes. Extracted corridor feature lines to generate a refined finished ground (FG) surface with smooth contour continuity.

Key Challenges and Technical Solutions

Challenge: Non-Perpendicular Alignment Skew

Challenge: Primary Crown and Secondary Elevation Tie-Ins

Challenge: Terrain Daylighting and Surface Integration

Key Challenges and Technical Solutions

Challenge: Non-Perpendicular Alignment Skew

Challenge: Primary Crown and Secondary Elevation Tie-Ins

Challenge: Terrain Daylighting and Surface Integration

Civil 3D Workflow Highlights

Multi-Baseline Corridor Modeling: Managed multiple alignments, profiles, and corridor regions within a single integrated network.
Target Mapping Controls: Applied horizontal width and vertical elevation targets along curb returns to automate pavement transitions.
Assembly Customization: Configured standard lane, curb/gutter, and daylighting subassemblies to maintain grade consistency.
Surface Extraction & Daylight Ties: Generated finished ground (FG) surfaces using corridor feature lines and tied cut/fill slopes back into existing ground (EG) contours.

Civil 3D Workflow Highlights

Multi-Baseline Corridor Modeling: Managed multiple alignments, profiles, and corridor regions within a single integrated network.
Target Mapping Controls: Applied horizontal width and vertical elevation targets along curb returns to automate pavement transitions.
Assembly Customization: Configured standard lane, curb/gutter, and daylighting subassemblies to maintain grade consistency.
Surface Extraction & Daylight Ties: Generated finished ground (FG) surfaces using corridor feature lines and tied cut/fill slopes back into existing ground (EG) contours.

Civil 3D Workflow Highlights

Multi-Baseline Corridor Modeling: Managed multiple alignments, profiles, and corridor regions within a single integrated network.
Target Mapping Controls: Applied horizontal width and vertical elevation targets along curb returns to automate pavement transitions.
Assembly Customization: Configured standard lane, curb/gutter, and daylighting subassemblies to maintain grade consistency.
Surface Extraction & Daylight Ties: Generated finished ground (FG) surfaces using corridor feature lines and tied cut/fill slopes back into existing ground (EG) contours.