§ 393.24 Requirements for head lamps, auxiliary driving lamps and front fog lamps.
发布02-19
生效03-23
摘要总结AI 辅助解读
该条款规定美国商用车辆（巴士、卡车及牵引车）的前照灯、辅助驾驶灯和前雾灯的技术要求。核心义务包括：前照灯必须提供可切换的远近光且为常亮型，并符合FMVSS No. 108标准；辅助灯和雾灯不得替代前照灯，仅可与前照灯配合使用，且需分别符合SAE J581和J583标准。此外，灯具的安装位置、可调性及光束瞄准角度均有严格规范，旨在确保夜间行车安全与合规性。
- (a) Headlamps. Every bus, truck and truck tractor shall be equipped with headlamps as required by § 393.11(a). The headlamps shall provide an upper and lower beam distribution of light, selectable at the driver's will and be steady-burning. The headlamps shall be marked in accordance with FMVSS No. 108. Auxiliary driving lamps and/or front fog lamps may not be used to satisfy the requirements of this paragraph.
- (b) Auxiliary driving lamps and front fog lamps. Commercial motor vehicles may be equipped with auxiliary driving lamps and/or front fog lamps for use in conjunction with, but not in lieu of the required headlamps. Auxiliary driving lamps shall meet SAE Standard J581 Auxiliary Upper Beam Lamps, July 2004, and front fog lamps shall meet SAE Standard J583 Front Fog Lamp, August 2004. (See § 393.7 for information on the incorporation by reference and availability of these documents.)
- (c) Mounting. Headlamps shall be mounted and aimable in accordance with FMVSS No. 108. Auxiliary driving lamps and front fog lamps shall be mounted so that the beams are aimable and the mounting shall prevent the aim of the lighting device from being disturbed while the vehicle is operating on public roads.
- (d) Aiming. Headlamps, auxiliary driving lamps and front fog lamps shall be aimed to meet the aiming specifications in FMVSS No. 108 (49 CFR 571.108), SAE J581, and SAE J583, respectively.
[70 FR 48046, Aug. 15, 2005]