SAE J3045_202502

This SAE Recommended Practice establishes a uniform, powered vehicle test procedure and minimum performance requirement for lane departure warning systems used in highway trucks and buses greater than 4546 kg (10000 pounds) gross vehicle weight (GVW). Systems similar in function but different in scope and complexity, including lane keeping/lane assist and merge assist, are not included in this document. This document does not apply to trailers, dollies, etc. This document does not intend to exclude any particular system or sensor technology. This document will test the functionality of the lane departure warning system (LDWS) (e.g., ability to detect lane presence and ability to detect an unintended lane departure), its ability to indicate LDWS engagement, its ability to indicate LDWS disengagement, and its ability to determine the point at which the LDWS notifies the human machine interface (HMI) or vehicle control system that a lane departure event is detected. Moreover, this document determines whether a system performs at a minimally acceptable level. The HMI is not addressed herein but is considered in SAE J2808. This document has been revised as part of a Five-Year Review. Minor revisions are included to improve process clarity. One technical revision is made to the facility roadway conditions lane curvature (see 7.1.3). This document describes testing procedures for a straight road lane departure test course, but previously it did not define a straight road even though it frequently references SAE J2808, which does define a straight road. Therefore, a definition of a straight road has been added and the roadway surface lane curvature specification (see 7.1.3) is revised from greater than 152.4 m (500 feet) to greater than 500 m (1640 feet).