Lane Marking API

Detailed Description

Data structures for describing lane boundary markings.

Lane markings describe the visual and physical characteristics of the markings at lane boundaries. This includes painted lines, physical curbs, and other delineation features.

The design is influenced by OpenDRIVE road marking specification and OSI (Open Simulation Interface) lane boundary concepts.

Classes
class	LaneBoundary
	Represents a boundary between adjacent lanes or at the edge of a Segment. More...
struct	LaneMarkingLine
	Describes a single line within a lane marking. More...
struct	LaneMarking
	Describes the complete lane marking at a lane boundary. More...
struct	LaneMarkingResult
	Result of querying lane marking at a specific position or range. More...

Enumerations
enum	LaneMarkingType {   kUnknown = 0, kNone, kSolid, kBroken,   kSolidSolid, kSolidBroken, kBrokenSolid, kBrokenBroken,   kBottsDots, kGrass, kCurb, kEdge }
	Describes the type/pattern of a lane marking line. More...
enum	LaneMarkingWeight { kUnknown = 0, kStandard, kBold }
	Describes the visual weight/thickness category of the marking. More...
enum	LaneMarkingColor {   kUnknown = 0, kWhite, kYellow, kOrange,   kRed, kBlue, kGreen, kViolet }
	Describes the color of the lane marking. More...
enum	LaneChangePermission {   kUnknown = 0, kAllowed, kToLeft, kToRight,   kProhibited }
	Describes the lane change permission indicated by the marking. More...

Enumeration Type Documentation

LaneChangePermission

enum LaneChangePermission

strong

Describes the lane change permission indicated by the marking.

This represents the legal interpretation of the marking regarding lane changes. The permission is typically determined by the marking type (e.g., solid vs. broken lines).

The Rule API may provide more detailed lane change rules that complement this marking-based permission. The recommendation is to rely on the Rule API for comprehensive lane change logic, using this marking information as supplementary context if needed.

Enumerator
kUnknown	Unknown or unspecified permission.
kAllowed	Lane change permitted (crossing the marking is allowed).
kToLeft	Lane change only permitted towards the left (increasing r).
kToRight	Lane change only permitted towards the right (decreasing r).
kProhibited	Lane change prohibited (crossing the marking is not allowed).

LaneMarkingColor

enum LaneMarkingColor

strong

Describes the color of the lane marking.

Colors have different meanings depending on the country's traffic regulations. For example:

• White: Typically separates traffic flowing in the same direction.
• Yellow: Typically separates traffic flowing in opposite directions (in some countries).
• Orange: Often used for temporary markings (e.g., construction zones).

Enumerator
kUnknown	Unknown or unspecified color.
kWhite	White marking.
kYellow	Yellow marking.
kOrange	Orange marking (often temporary).
kRed	Red marking.
kBlue	Blue marking (e.g., handicap zones).
kGreen	Green marking (e.g., bike lanes in some regions).
kViolet	Violet/purple marking.

LaneMarkingType

enum LaneMarkingType

strong

Describes the type/pattern of a lane marking line.

These types represent common road marking patterns found in road networks. The naming follows OpenDRIVE conventions where applicable.

Enumerator
kUnknown	Unknown or unspecified marking type.
kNone	No visible marking present.
kSolid	Continuous solid line.
kBroken	Dashed/broken line pattern.
kSolidSolid	Double solid lines (two parallel solid lines).
kSolidBroken	Solid line on the inner side, broken on the outer side.
kBrokenSolid	Broken line on the inner side, solid on the outer side.
kBrokenBroken	Double broken lines (two parallel dashed lines).
kBottsDots	Botts' dots (raised pavement markers).
kGrass	Grass edge (natural boundary, no painted marking).
kCurb	Physical curb boundary.
kEdge	Edge line (typically at road boundary).

LaneMarkingWeight

enum LaneMarkingWeight

strong

Describes the visual weight/thickness category of the marking.

Weight affects the visual prominence of the marking. Bold markings are typically used to emphasize important boundaries.

Enumerator
kUnknown	Unknown or unspecified weight.
kStandard	Standard/normal width marking.
kBold	Wide/bold marking (typically 2x standard width).