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California MUTCD 2014 Edition Page 1251 (FHWA's MUTCD 2009 Edition, including Revisions 1 & 2, as amcnded for use in California) CHAPTER 61. CONTROL OF TRAFFIC THROUGH TRAFFIC INCIDENT MANAGEMENT AREAS Section 6I.01 General Support: of The National Incident Management System (NIMS) requires the use of the Incident Command System (ICS) at traffic incident management scenes. 02 A traffic incident is an emergency road user occurrence, a natural disaster, or other unplanned event that affects or impedes the normal flow of traffic. 03 A traffic incident management area is an area of a highway where temporary traffic controls are installed, as authorized by a public authority or the official having jurisdiction of the roadway, in response to a road user incident, natural disaster, hazardous material spill, or other unplanned incident. It is a type of TTC zone and extends from the first warning device (such as a sign, light, or cone) to the last TTC device or to a paint where vehicles return to the original lane alignment and are clear of the incident. 04 Traffic incidents can be divided into three general classes of duration, each of which has unique traffic control characteristics and needs. These classes are: A. Major—expected duration of more than 2 hours, B. Intermediate --expected duration of 30 minutes to 2 hours, and C. Minor—expected duration under 30 minutes, os The primary functions of TTC at a traffic incident management area are to inform road users of the incident and to provide guidance information on the path to follow through the incident area. Alerting road users and establishing a well defined path to guide road users through the incident area will serve to protect the incident responders and those involved in working at the incident scene and will aid in moving road users expeditiously past or around the traffic incident, will reduce the likelihood of secondary traffic crashes, and will preclude unnecessary use of the surrounding local road system. Examples include a stalled vehicle blocking a lane, a traffic crash blocking the traveled way, a hazardous matcrial spill along a highway, and natural disasters such as floods and severe storm damage. Guidance: obin order to reduce response time f»• traffic incidents, highway agencies, appropriate public safety agencies (law enforcement, fire and rescue, emergency communications, einergency medical, and other emergency management), and private sector responders (roving and recovery and hazardous materials contractors) should mutually plan for occurrences of traffic incidents along the major and heavily traveled highway and street system. 07 On -scene responder organizations should train their personnel in TTC practices far accomplishing their tasks in and near traffic and in the requirements far tragic incident management contained in this Manual. On - scene responders should lake measures to move the incident off the traveled roadway or to provide for appropriate warning. All on -scene responders and news media personnel should constantly be aware of their visibility to oncoming traffic and wear high -visibility apparel. See Section 6D.03 for details on high -visibility apparel requirements, osEmergenry vehicles should be safe positioned (see definition in Section 1A. 13) such that traffic flow through the incident scene is optimized. All emergency vehicles that subsequently arrive should be positioned in a manner that does not interfere with the established temporary traffic flaw. o9Responders arriving at a traffic incident should estimate the magnitude of'the traffic incident, the expected time duration of the tra1fic incident, and the expected vehicle queue length, and thea should set up the appropriate temporary traffic controls for these estimates, Option: ja Warning and guide signs used for TTC traffic incident management situations may have a black legend and homier on a fluorescent pink background (see Figure 61-1). Chapter 61— Control of Traffic Through Traffic Incident Management Areas November 7, 2014 Part 6 — Temporary Traffic Conlrol