Use the warning symbols to verify whether the alignment design meets the specified criteria and design checks, or if the alignment entities are tangent to each other.
When an alignment uses the criteria-based design feature, the alignment geometry must meet the design criteria specified in the design criteria file and design checks.
You can also specify that AutoCAD Civil 3D checks that each line, curve, and spiral entity is tangent and connected to adjacent entities.
When an alignment sub-entity either violates the design criteria, or is not tangent to an adjacent entity, a warning symbol is displayed in the following locations:
You can use the warning symbols in the drawing window to view information about design violations. When the cursor is hovered over a warning symbol in the drawing window, a tooltip displays information about the violation. If a design criteria was violated, the tooltip displays the criteria that was violated, as well as the minimum value required to meet the criteria. If a design check was violated, the tooltip displays the name of the design check that was violated. If tangency was violated, the tooltip indicates which entity (previous or next) is not tangent with the current entity.
The name of the design check should be similar to the formula you enter in the Design Check field. When a design check is violated, only the design check name is displayed, and not the minimum acceptable value. If the formula is in the design check name, it is easier to correct the violation.
Tutorial Exercise: Viewing and Correcting Alignment Design Criteria Violations