5 Backward compatibility

Roads now support up to two lane layers: one permanent (standard road layout) and one temporary (typically for roadworks). The temporary lane layer has higher priority for traffic guidance and driving rules, while material properties are inherited from the permanent layer.

Lane links can now connect permanent lanes to temporary ones, enabling smooth transitions into and out of construction zones.

A new term for continuous sections in the temporary lane layer has been introduced.

The use of @roadworks=true has been clarified.

Objects and signals now feature a @temporary attribute to define installations like mobile speed signs.

Elements can be marked with @invalidated=true to represent physical infrastructure that is present but logically inactive, such as covered or crossed-out signs.

The new <curveLocal> element allows object outlines to be defined using arcs and parametric cubic polynomials instead of just polylines.

Use of @distance=0 has been formalized as "continuous" mode, where the object profile is extruded along a path to model features like guardrails, walls, or fences.

Markings on objects (e.g. crosswalks or parking box lines) can now be defined relative to the object’s bounding volume or specific outline points. These were also more clearly distinguished from other road markings.

Semantic definitions now include <vehicle>, <person>, and <animal> elements.

When using OpenCRG in "global" mode, users can now apply translation (x, y, z) and heading (h) offsets.