法规速查Regulation Navigator
先看懂要求，再查清依据。Understand the rule. Find its source.
部分资料含历史版本或来源限制。收录日期不代表现行性已复核；请先核对每项官方来源、版本和适用范围。Some records contain historical versions or source limitations. Capture dates do not establish a review of current requirements; check each official source, edition and scope before use.
法规索引Regulation index
按中文名称了解每条管什么，再展开查看解读与官方原文。Browse by subject, then expand an entry for available explanations and official text.
轮胎要求§ 393.75 Tires.§ 393.75 Tires.轮胎要求
车灯正常工作与反光装置不受遮挡§ 393.9 Lamps operable, prohibition of obstructions of lamps and reflectors.§ 393.9 Lamps operable, prohibition of obstructions of lamps and reflectors.车灯正常工作与反光装置不受遮挡
适用于联邦 Part 393 覆盖的货车和牵引车。本文选择常见检查项目，不替代完整出车检查、维修标准或特定车辆例外。For trucks and truck tractors covered by federal Part 393. These are common inspection points, not a replacement for the full pre-trip inspection, maintenance requirements or vehicle-specific exceptions.
所需灯光须正常工作，反光装置也须保持可见Required lights must work and remain visible
- 具体要求What the rule requires
- 本分部要求的灯具须能正常工作。所要求的灯具、反光器和反光材料，不得被车板、货物、遮盖物或污物挡住。检查时应实际测试功能并查看可见性，仅看灯壳是否完好还不够。Lamps required by the subpart must operate, and required lamps, reflectors and reflective material must not be obscured by bodywork, loads, coverings or dirt. Check operation and visibility, not merely whether the housing looks intact.
- 条件与例外Conditions and exceptions
- 条文为前端保护装置上的特定反光标识规定了例外，该例外不表示可以遮挡所有反光装置。The specified exception for conspicuity treatment on front-end protection devices does not permit covering all reflectors.
(a) (a) All lamps required by this subpart shall be capable of being operated at all times. This paragraph shall not be construed to require that any auxiliary or additional lamp be capable of operating at all times.
(b) (b) Lamps and reflective devices/material required by this subpart must not be obscured by the tailboard, or by any part of the load, or its covering by dirt, or other added vehicle or work equipment, or otherwise. Exception: The conspicuity treatments on the front end protection devices may be obscured by part of the load being transported.
使用固定来源版次；适用日期与例外以原文及历史沿革为准。Uses a fixed source edition; check the original and statutory history for operative dates and exceptions.
法规原文 · 英文REGULATION TEXT · ENGLISH
车灯正常工作与反光装置不受遮挡§ 393.9 Lamps operable, prohibition of obstructions of lamps and reflectors.
官方来源快照；不代表已核对现行汇编及后续修订。请核对来源版本。Official-source snapshot; current consolidated law and subsequent amendments have not been verified.
展开英文原文Read the English original收起英文原文Hide the English original
49 CFR 393.9 · § 393.9 Lamps operable, prohibition of obstructions of lamps and reflectors.
§ 393.9 Lamps operable, prohibition of obstructions of lamps and reflectors.
(a)All lamps required by this subpart shall be capable of being operated at all times. This paragraph shall not be construed to require that any auxiliary or additional lamp be capable of operating at all times.
(b)Lamps and reflective devices/material required by this subpart must not be obscured by the tailboard, or by any part of the load, or its covering by dirt, or other added vehicle or work equipment, or otherwise. Exception: The conspicuity treatments on the front end protection devices may be obscured by part of the load being transported.
[70 FR 48027, Aug. 15, 2005]
依据关联的官方原文及官方项目说明起草。中文和英文解读均为 CTAC AI 辅助工作稿，未经人工审核；教学案例不是实际会员记录。采集日期不是法规生效日期。Drafted from linked official texts and agency guidance. Both language interpretations are CTAC AI-assisted drafts pending human review; examples are illustrative, not member records. Capture dates are not legal effective dates.
动力车辆应配备的应急设备§ 393.95 Emergency equipment on all power units.§ 393.95 Emergency equipment on all power units.动力车辆应配备的应急设备
中文为 CTAC 白话说明，不是官方译文，也不构成个案法律意见。请先核对适用范围、来源版本与最新官方通知。CTAC plain-language explanations are not official translations or case-specific legal advice. Check scope, source editions and current official notices.