Steer indication

You can use 3D-MC to manually steer the machine POI to a polyline layer in the linework file. An alignment file is frequently used to grade/pave along an alignment line. Polylines represent features or objects. These include building pads, curbs, sidewalks, the top/toe of slopes, or boundaries on the project. The polyline can have three-dimensional information at each transition point. If it does, it can be selected on the main screen as the alignment line to manually steer to. You can also use it as the design elevation to control the blade.

Steering Definitions

Steering Indication – Shows the Steering Offset on the Steering Indication Light Bar and Steering Display Texts.
Steering Line – A line selected from the feature lines or center line of the active Alignment. It is also known as an offset line from the selected feature line or center line of the active Alignment.
Steering POI – The Point of interest (POI) on a machine that is used to calculate the Steering Offset. This is different in machines.
Steering Offset – A calculated cross distance between steering POI and steering line. A positive value is an offset to the left of the steering line. A negative value is an offset to the right. This value is also related to the travel direction of the machine.
Additional Steering Offset – The operator can steer the machine at the offset distance from the Alignment feature line. A positive value is an offset to the left of the alignment. A negative value is an offset to the right of the alignment. Different from steering offset, left and right is relative to the steering line. The machine direction does not have an effect.

Steering line and offsets for machines

Machine travel up and stationing on the left
Steering Line Direction	Steering Offset	Additional Steering Offset
Same	Positive	Positive
Steering Line Active Alignment Steering Line Direction Additional Steering Offset Steering Offset Machine Travel Direction

Machine travel up and stationing on the right
Steering Line Direction	Steering Offset	Additional Steering Offset
Same	Negative	Positive
Steering Line Active Alignment Steering Line Direction Additional Steering Offset Steering Offset Machine Travel Direction

Machine travel down and stationing on the left
Steering Line Direction	Steering Offset	Additional Steering Offset
Opposite	Positive	Positive
Steering Line Active Alignment Steering Line Direction Additional Steering Offset Steering Offset Machine Travel Direction

Machine travel down and stationing on the right
Steering Line Direction	Steering Offset	Additional Steering Offset
Opposite	Negative	Positive
Steering Line Active Alignment Steering Line Direction Additional Steering Offset Steering Offset Machine Travel Direction