Intelligent transport systems — Lane departure warning systems — Performance requirements and test procedures
1 Scope
This standard specifies the definition of the system, classification, functions, human–machine interface (HMI) and test methods for lane departure warning systems.
This standard applies to passenger cars and commercial vehicles, but not to alarms on road sections with temporary or irregular lane signs (such as road construction areas).
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 3730.2-1996 Road vehicle — Masses — Vocabulary and codes (ISO 1176: 1990, IDT)
GB 5768 Road traffic signs and markings
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 3730.2-1996 and the following apply.
3.1
lane
area of roadway that a vehicle would be expected to travel along in the absence of any obstruction without the driver's desire to change the path of travel
3.2
visible lane marking
markings intentionally placed on the borderline of the lane that are directly visible by the driver while driving (i.e., not covered by snow, etc.)
3.3
incidental visible road feature
visible patterns on the road surface that were not explicitly intended to delineate the boundaries of the lane but which are indicative of the position of the lane
Note: These include such features as pavement seams or edges, kerbs, and tracks or ruts left by previous vehicles.
3.4
lane boundary
borderline of the lane, situated at a visible lane marking or, in the absence of a visible lane marking, determined by incidental visible road features or other means such as GPS, magnetic nails, etc. See Figures 1 and 2.
3.5
default lane width
predetermined width given to a lane when a visible lane marking exists only on one side of the lane and no other lane boundaries are detected by the system
3.6
departure
situation in which the outside of one of the front wheels of a vehicle or of the leading part of an articulated vehicle is crossing a specified line
Note: In the case of a three-wheeled vehicle, the outer edge of one of the front wheels is the outer edge of one of the wheels on the axle with the widest track
Foreword i
Introduction ii
1 Scope
2 Normative references
3 Terms and definitions
4 Technical requirements
5 Test method
