Main Content

Span Editing

Various attributes are represented as parametric spans along lanes, roads, and other objects. This topic provides common steps to create, delete, and modify these span instances. Various tools use span editing concepts, such as the Lane Marking Tool, Prop Span Tool, or Road Construction Tool.

Span Overview

Span-based attributes are defined by the following components.

Parent Object

Span-based attributes are defined parametrically along a curve-based parent object. Typically, the parent object is either a road (as in the Road Construction Tool) or a lane (as in the Lane Marking Tool).

Span Nodes

Span nodes (red circles) selected in the Lane Marking Tool. These nodes indicate locations where the marking type changes along the lane.

Span nodes (red lines) selected in the Road Construction Tool. These nodes indicate where bridges start and end along a road.

Span nodes are parametric objects along a parent curve that define where attribution changes. The visual representation of nodes differs depending on the tool (as shown in the previous images).

Span nodes can be moved along the parent curve. Nodes can also be added along a curve, and existing nodes can be deleted.

Node locations are automatically updated when the parent curve is modified (for example, when the parent road's shape is changed).

Span End Nodes

Span end nodes selected in the Road Construction Tool.

Span end nodes are a special type of span node that lie at the beginning and end of the parent curve. For most types of span-based attributes, these span end nodes are automatically created and cannot be deleted.

Spans

Span selected in the Lane Marking Tool. This span defines the lane marking type between two nodes.

Span selected in the Road Construction Tool. This span defines the construction type (for example, bridge) between two nodes.

A span is a range along a parent curve bounded by two span nodes. For most types of span-based attributes, the span is automatically created between the span end nodes and cannot be deleted.

Select a Span or Span Node

The steps to select a span differ slightly depending on the tool, but the steps are typically similar to the following.

  1. Select the parent object containing the span (typically either a road or a lane on a road).

  2. Select the desired span or span node.

Create a New Span Node

New span nodes are created by splitting a span into two spans.

  1. Select the parent object containing the span.

  2. Right-click an existing span at the location where you want to insert the new node.

Note

In most cases, any attributes stored in the span are copied into the two new spans.

Edit Attributes of a Span or Span Node

  1. Select a span or span node.

  2. Adjust the properties in the Attributes pane.

Alternatively, for asset-based attributes such as in the Lane Marking Tool and Prop Span Tool, click and drag a compatible asset type from the Library Browser to the span or span node.

Note

Some span-based attributes only store data on the spans, others only store data on the span nodes, and some store data on both.

Span nodes always have a "Distance" attribute that defines the distance of the node along the parent curve.

Move a Span Node

  1. Select the parent object containing the span.

  2. Click and drag the node along the parent curve.

Alternatively:

  1. Select the parent object containing the span.

  2. Select the span node.

  3. In the Attributes pane, adjust the Distance attribute.

Note

Most span nodes cannot be moved past another node, and must remain a minimum distance from surrounding nodes.

Delete a Span Node

  1. Select the parent object containing the span.

  2. Select the span node.

  3. Delete the span node.

Tips for Deleting Nodes

  • In most cases, the span end nodes (the nodes at the end of the parent curve) cannot be deleted.

  • Deleting a span node combines the two attached spans into a single span. In most cases, the single span receives the attributes of the longer span. The shorter span is removed.