Places a forward turn simulation using the current vehicle based on following selected path elements with the center of the steering axle group (a traditional centerline path follow turn simulation) or by offsetting the turn simulation a specified distance relative to the tires envelopes (an offset turn simulation).

Note:

• Only forward maneuvers can be created using this tool. For reverse maneuvers, see Reverse Maneuvers.
• This tool requires existing CAD geometry in the drawing to act as the path elements. The geometry may consist of lines and arcs, a polyline/complex chain, or an alignment. Lines and arcs can not be combined with polylines/complex chains or alignments to make up the path elements.
  • If the pre-drawn path elements consist of lines/arcs, select the path elements in the desired direction of travel, and then click a blank spot in the drawing.
  • If the pre-drawn path elements consist of a polyline/complex chain or an alignment, select the path element nearer to the start than the end.
• A circle indicates the start point and an arrow symbol at the end represents the direction of travel.

Example of a Centered Place Adaptive Simulation

Example of an Offset Place Adaptive Simulation

Place Adaptive Simulation Dialog Box

Use Last Path

Click this button to select the last pre-drawn path that was selected for use with this tool.

Simulation Type

Indicates which type and direction of turn simulation is being placed:

• Offset Left Note: This functionality is only available in AutoTURN and AutoTURN Pro.
• Centered
• Offset Right Note: This functionality is only available in AutoTURN and AutoTURN Pro.

Vehicle

Cites the library and name of the vehicle used in the simulation.

Click Select Vehicle to change the vehicle used in the simulation.

Offset

This is the distance between the selected path elements and the closest tire envelope in the turn simulation at any given point in the turn simulation. How this value is measured depends on the setting of the Use Smooth Transitions check box:

When the Use Smooth Transitions check box is cleared, the offset is maintained from the tire track (front or rear) which is closest to the selected path elements.

When the Use Smooth Transitions check box is selected, the offset is maintained from the selected Simulation Envelope to the selected path elements.

Use Smooth Transitions

Select this option to place the offset turn simulation with smooth transitions between changes in direction. This option generally makes for a more natural turn simulation.

Simulation Envelope

Select which type of simulation envelope is measured against to maintain the Offset dimension:

• Front and Rear Tires
• Vehicle Body
• Body Clearance

Maximum Deviation

This value controls how much variance there is in the Offset dimension.

Minimum Radius

This is the minimum radius used to calculate the arcs in the centerline vehicle path.

Oversteer Applied At

This setting specifies where in the turn simulation the oversteer is applied. Move the slider towards the left to apply the oversteer nearer to the beginning of the turns or to the right to apply the oversteer nearer to the end of the turns in the simulation.

Link turn simulation to path geometry

Select this check box to link the turn simulation to the path element. When the path element changes (e.g. when grip editing is performed via AutoCAD/MicroStation commands), the turn simulation will update to reflect the changes in geometry.

Note: This option is only available for polyline/complex chain or alignment path elements.

Steering and Articulating Angles

If the vehicle’s steering lock or articulating angle is exceeded at any point along the path, the simulation will terminate at the point where the angle was exceeded. The exceeded angle will also be displayed as in the following illustration.

Example of a simulation where the steering lock angle was exceeded

In the event that an angle is exceeded during the course of a simulation, delete the simulation, increase the radius of the arc where the simulation stopped (or otherwise alter the path), and then pick the path and place the simulation again. It is suggested that turn radii are of at least the minimum centerline turning radius for the vehicle.