Permits & Development - Encroachment(EP)/Driveway(DW) Permits - 2007_EP-07-301 thru EP-07-400_ - EP-07-317

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California MUTCD (FHWA's MUTCD 2003 Revision 1,as amended for use in California) Page 6F-18 Guidance: The TRAFFIC CONTROL—WAIT AND FOLLOW PILOT CAR(C37(CA))sign should be used at intersecting approaches to a work zone when pilot cars are controlling reversible lane traffic. Section 6F.55 Portable Changeable Message Signs Standard: Portable Changeable Message signs shall be TTC devices with the flexibility to display a variety of messages. Each message shall consist of either one or two phases.A phase shall consist of up to three lines of eight characters per line.Each character module shall use at least a five wide and seven high pixel matrix. Support: Portable Changeable Message signs are used most frequently on high-density urban freeways, but have applications on all types of highways where highway alignment,road user routing problems, or other pertinent conditions:require advance warning and information. Portable Changeable Message signs have a wide variety of applications in TTC zones including: roadway, lane, or ramp closures, crash or emergency incident management, width restriction information, speed control or reductions, advisories on work scheduling,road user management and diversion, warning of adverse conditions or special events, and other operational control. The primary purpose of Portable Changeable Message signs in TTC zones is to advise the road user of unexpected situations. Soine typical applications include the following: A. Where the speed of vehicular traffic is expected to drop substantially; B. Where significant queuing and delays are expected; C. Where adverse;environmental conditions are present; D. Where there are changes in alignment or surface conditions; E. Where advance notice of ramp, lane, or roadway closures is needed; F. Where crash or incident management is needed; and/or G. Where changes in the road user pattern occur. Guidance: The components of a Portable Changeable Message sign should include: a message sign panel,control systems, a power source, and mounting and transporting equipment. Portable Changeable Message signs should subscribe to the principles established in Section 2A.07 and other sections of this Manual and,to the extent practical, with the design(that is,color, letter size and shape, and borders)and applications prescribed in this Manual, except that the reverse colors for the letters and the background are considered acceptable. The front face of the sign should be covered with a protective material. The color of the elements should be yellow or orange on a black background. Portable Changeable Message signs should be visible from 800 in(0.5 mi)under both day and night conditions. For a trailer or large truck mounted sign, the letter height should be a minimum of 450 mm(18 in). For Changeable Message signs mounted on service patrol trucks, the letter height should be a minimum of 250 mm(10 in). The message panel should have adjustable display rates (minimum of 3 seconds per phase), so that the entire message can be read;at least twice at the posted speed, the off-peak 85th-percentile speed prior to work starting, or the anticipated operating speed. Messages should be designed taking into account the following factors: A. Each phase should convey a single thought. B. If the message can be;displayed in one phase,the top line should present the problem, the center line should present the location or distance ahead, and the bottom line should present the recommended driver action. C. The message should be as brief as possible. D. When a message,is longer than two phases, additional Portable Changeable Message signs should be used. E. When abbreviations are used,they should be easily understood(see Section 1A.14). Chapter 6F—Temporary Traffic Control Zone Devices Part 6-Temporary Traffic Control September 26,2006