Streets can contain a street centerline, roadbed lanes, and sidewalk lanes in ArcGIS CityEngine.
Click the Segment button 
in the Inspector window to use the parameters and object attributes:
When streets are selected in the Viewport window, you can manage the segment parameters, attributes, and the street configurations in the Inspector window.
Segment parameters
The following table lists the segment parameters:
Total Width | The total width of the street or the sum of all the roadbed and sidewalk lane widths. |
Segment Offset (attr streetOffset) | The distance the geometry will be offset from the centerline. |
Precision (attr precision) | Graph nodes are interpolated using Bezier splines, resulting in curved streets. This parameter defines the spline sampling precision; in other words, 0 leads to a minimal number of spline sampling points and 1 leads to a maximal number of spline sampling points. |
Create Shape (attr shapeCreation) | Enable the lane shape creation. |
Note:
Parameters (attributes) can be mapped to Default, User, Object, or to a map layer. See Map attributes with the Connection Editor for more information.
Object attributes
Object attributes provide basic information about the underlying graph and give context information. CGA rules access the following attributes:
connectionEnd | The adjacent geometry at the start or end of a street segment shape. Possible values are STREET, CROSSING, JUNCTION, JUNCTION_ENTRY, DEAD_END, FREEWAY, FREEWAY_ENTRY, and ROUNDABOUT. |
connectionStart | |
type | The possible values for this attribute are MAJOR or MINOR. The MAJOR value is used to identify the main streets when using the Grow Streets tool. The street segment lines are also rendered thicker when the MAJOR value is used. |