Document ID: chunk:federal_register_of_legislation:F2025C00112:body:0:p5
Version: federal_register_of_legislation:F2025C00112
Segment Type: other
Provision Reference: 
Character Range: 15310–18301

18
 2 Arrangements of approval marks...................................... 19
 3 Visible lane marking identification..................................... 20

         Introduction

 The intention of this Regulation is to establish uniform provisions for Lane Departure Warning Systems (LDWS) fitted to motor vehicles of the categories M2, M3, N2 and N3[1] primarily used under highway conditions.
 These vehicle categories will benefit from the fitment of a LDWS, especially in the field of monotonous driving situations. The benefit of such system installation is to support a distracted or drowsy driver by warning if the vehicle is unintentionally leaving the lane.
 While, in general, those vehicle categories will benefit from the fitment of a LDWS, there are subgroups where the benefit is rather uncertain because they are primarily used in other conditions than highway conditions (e.g. buses with standing passengers i.e. Classes I, II and A, off-road vehicles1, construction vehicles, special purpose vehicles, etc.). Regardless from the benefit, there are other subgroups where the installation of LDWS would be technically difficult (e.g. on vehicles equipped with split windshields, asymmetrical cabs, windshield of high thickness, front hood vehicles, vehicles with front mounted equipment, etc.).
 The system shall automatically detect unintentional drift of the vehicle out of its travel lane and warn the driver.
 The system shall provide a warning, so that an inattentive driver is made aware of a critical situation.
 The Regulation cannot include all the traffic conditions and infrastructure features in the type-approval process. Actual conditions and features in the real world should not result in false warnings to the extent that they encourage the driver to switch the system off.
1.  Scope
 This Regulation applies to the lane departure warning system of vehicles of categories M2, N2, M3 and N3.[2]
2.  Definitions
              For the purposes of this Regulation:

2.1. "Approval of a vehicle type" means the full procedure whereby a Contracting Party to the Agreement certifies that a vehicle type meets the technical requirements of this Regulation;
2.2. "Vehicle type with regard to its Lane Departure Warning System" means a category of vehicles which do not differ in such essential respects as:
 (a) The manufacturer's trade name or mark;
 (b) Vehicle features which significantly influence the performances of the   Lane Departure Warning System;
 (c) The type and design of the Lane Departure Warning System;
2.3. "Lane Departure Warning System (LDWS)" means a system to warn the driver of an unintentional drift of the vehicle out of its travel lane;
2.4. "Lane" means one of the longitudinal strips into which a roadway is divided (as shown in Annex 3);
2.5. "Visible lane marking" means delineators intentionally placed on the borderline of the lane that are directly visible by the driver while driving (e.g. not covered by snow, etc.);
2.6. "Rate