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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.
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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.
California Vehicle Code § 16000California Vehicle Code § 16000
California Vehicle Code § 2813California Vehicle Code § 2813
车辆紧急停车后的警示措施§ 392.22 Emergency signals; stopped commercial motor vehicles.§ 392.22 Emergency signals; stopped commercial motor vehicles.车辆紧急停车后的警示措施
面向加州商业车辆驾驶员，以及适用联邦检查规则的承运人。现场执法和急救指示仍须遵守；本文不判定事故责任，其他州的申报要求也须另查。For California commercial drivers and carriers subject to federal inspection rules. This guide does not decide fault, replace emergency or enforcement directions, or apply California reporting rules to every state.
路肩故障停车，双闪不能代替警示装置Hazard lights do not replace required roadside warning devices
- 具体要求What the rule requires
- 除正常交通停车等适用情形外，车辆停在公路行车道或路肩时，应立即开启双闪，并尽快、最迟在十分钟内按规定摆放警示装置。双向道路与分隔／单行道路的摆放位置不同；弯道、坡顶、遮挡及易燃物泄漏等现场还须遵守额外要求，不能统一套用一组距离。Except necessary traffic stops and applicable exceptions, activate hazard flashers immediately when stopped on the traveled highway or shoulder and place required warning devices as soon as possible, within ten minutes. Placement differs on two-way versus divided/one-way roads, with additional rules for curves, crests, obstructions and flammable leaks.
(a) (a) Hazard warning signal flashers. Whenever a commercial motor vehicle is stopped upon the traveled portion of a highway or the shoulder of a highway for any cause other than necessary traffic stops, the driver of the stopped commercial motor vehicle shall immediately activate the vehicular hazard warning signal flashers and continue the flashing until the driver places the warning devices required by paragraph (b) of this section. The flashing signals shall be used during the time the warning devices are picked up for storage before movement of the commercial motor vehicle. The flashing lights may be used at other times while a commercial motor vehicle is stopped in addition to, but not in lieu of, the warning devices required by paragraph (b) of this section.
(b) (b) Placement of warning devices—(1) General rule. Except as provided in paragraph (b)(2) of this section, whenever a commercial motor vehicle is stopped upon the traveled portion or the shoulder of a highway for any cause other than necessary traffic stops, the driver shall, as soon as possible, but in any event within 10 minutes, place the warning devices required by § 393.95 of this subchapter, in the following manner:
(i) One on the traffic side of and 4 paces (approximately 3 meters or 10 feet) from the stopped commercial motor vehicle in the direction of approaching traffic;
(ii) One at 40 paces (approximately 30 meters or 100 feet) from the stopped commercial motor vehicle in the center of the traffic lane or shoulder occupied by the commercial motor vehicle and in the direction of approaching traffic; and
(iii) One at 40 paces (approximately 30 meters or 100 feet) from the stopped commercial motor vehicle in the center of the traffic lane or shoulder occupied by the commercial motor vehicle and in the direction away from approaching traffic.
(iii) Business or residential districts. The placement of warning devices is not required within the business or residential district of a municipality, except during the time lighted lamps are required and when street or highway lighting is insufficient to make a commercial motor vehicle clearly discernable at a distance of 500 feet to persons on the highway.
(iv) Hills, curves, and obstructions. If a commercial motor vehicle is stopped within 500 feet of a curve, crest of a hill, or other obstruction to view, the driver shall place the warning signal required by paragraph (b)(1) of this section in the direction of the obstruction to view a distance of 100 feet to 500 feet from the stopped commercial motor vehicle so as to afford ample warning to other users of the highway.
(v) Divided or one-way roads. If a commercial motor vehicle is stopped upon the traveled portion or the shoulder of a divided or one-way highway, the driver shall place the warning devices required by paragraph (b)(1) of this section, one warning device at a distance of 200 feet and one warning device at a distance of 100 feet in a direction toward approaching traffic in the center of the lane or shoulder occupied by the commercial motor vehicle. He/she shall place one warning device at the traffic side of the commercial motor vehicle within 10 feet of the rear of the commercial motor vehicle.
(vi) Leaking, flammable material. If gasoline or any other flammable liquid, or combustible liquid or gas seeps or leaks from a fuel container or a commercial motor vehicle stopped upon a highway, no emergency warning signal producing a flame shall be lighted or placed except at such a distance from any such liquid or gas as will assure the prevention of a fire or explosion.
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
车辆紧急停车后的警示措施§ 392.22 Emergency signals; stopped commercial motor vehicles.
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 392.22 · § 392.22 Emergency signals; stopped commercial motor vehicles.
§ 392.22 Emergency signals; stopped commercial motor vehicles.
(a)Hazard warning signal flashers. Whenever a commercial motor vehicle is stopped upon the traveled portion of a highway or the shoulder of a highway for any cause other than necessary traffic stops, the driver of the stopped commercial motor vehicle shall immediately activate the vehicular hazard warning signal flashers and continue the flashing until the driver places the warning devices required by paragraph (b) of this section. The flashing signals shall be used during the time the warning devices are picked up for storage before movement of the commercial motor vehicle. The flashing lights may be used at other times while a commercial motor vehicle is stopped in addition to, but not in lieu of, the warning devices required by paragraph (b) of this section.
(b)Placement of warning devices—(1) General rule. Except as provided in paragraph (b)(2) of this section, whenever a commercial motor vehicle is stopped upon the traveled portion or the shoulder of a highway for any cause other than necessary traffic stops, the driver shall, as soon as possible, but in any event within 10 minutes, place the warning devices required by § 393.95 of this subchapter, in the following manner:
(i) One on the traffic side of and 4 paces (approximately 3 meters or 10 feet) from the stopped commercial motor vehicle in the direction of approaching traffic;
(ii) One at 40 paces (approximately 30 meters or 100 feet) from the stopped commercial motor vehicle in the center of the traffic lane or shoulder occupied by the commercial motor vehicle and in the direction of approaching traffic; and
(iii) One at 40 paces (approximately 30 meters or 100 feet) from the stopped commercial motor vehicle in the center of the traffic lane or shoulder occupied by the commercial motor vehicle and in the direction away from approaching traffic.
(2) Special rules—(i) Fusees. The driver of a commercial motor vehicle equipped with only fusees shall place a lighted fusee at each of the locations specified in paragraph (b)(1) of this section. There shall be at least one lighted fusee at each of the prescribed locations, as long as the commercial motor vehicle is stopped. Before the stopped commercial motor vehicle is moved, the driver shall extinguish and remove each fusee.
(ii) Daylight hours. Except as provided in paragraph (b)(2)(iii) of this section, during the period lighted lamps are not required, three bidirectional reflective triangles or three lighted fusees shall be placed as specified in paragraph (b)(1) of this section within a time of 10 minutes. In the event the driver elects to use only fusees in lieu of bidirectional reflective triangles or red flags, the driver must ensure that at least one fusee remains lighted at each of the prescribed locations as long as the commercial motor vehicle is stopped or parked.
(iii) Business or residential districts. The placement of warning devices is not required within the business or residential district of a municipality, except during the time lighted lamps are required and when street or highway lighting is insufficient to make a commercial motor vehicle clearly discernable at a distance of 500 feet to persons on the highway.
(iv) Hills, curves, and obstructions. If a commercial motor vehicle is stopped within 500 feet of a curve, crest of a hill, or other obstruction to view, the driver shall place the warning signal required by paragraph (b)(1) of this section in the direction of the obstruction to view a distance of 100 feet to 500 feet from the stopped commercial motor vehicle so as to afford ample warning to other users of the highway.
(v) Divided or one-way roads. If a commercial motor vehicle is stopped upon the traveled portion or the shoulder of a divided or one-way highway, the driver shall place the warning devices required by paragraph (b)(1) of this section, one warning device at a distance of 200 feet and one warning device at a distance of 100 feet in a direction toward approaching traffic in the center of the lane or shoulder occupied by the commercial motor vehicle. He/she shall place one warning device at the traffic side of the commercial motor vehicle within 10 feet of the rear of the commercial motor vehicle.
(vi) Leaking, flammable material. If gasoline or any other flammable liquid, or combustible liquid or gas seeps or leaks from a fuel container or a commercial motor vehicle stopped upon a highway, no emergency warning signal producing a flame shall be lighted or placed except at such a distance from any such liquid or gas as will assure the prevention of a fire or explosion.
[37 FR 17175, Aug. 25, 1972, as amended at 40 FR 10685, Mar. 7, 1975; 47 FR 47837, Oct. 28, 1982; 48 FR 57139, Dec. 23, 1983; 59 FR 34711, July 6, 1994; 60 FR 38747, July 28, 1995; 63 FR 33279, June 18, 1998; 91 FR 7870, Feb. 19, 2026]
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.
相关实务指南Related practical guides
行驶中车辆与联运设备的执法检查§ 396.9 Inspection of motor vehicles and intermodal equipment in operation.查看执法检查、停驶处理与检查报告的相关规定。Vehicle & road safety§ 396.9 Inspection of motor vehicles and intermodal equipment in operation.行驶中车辆与联运设备的执法检查
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.