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California MUTCD 2014 Edition <br />(FHWA’s MUTCD 2009 Edition, including Revisions 1 & 2, as amended for use in California) <br />Chapter 6H – Typical Applications November 7, 2014 <br />Part 6 – Temporary Traffic Control <br />Page 1149 <br />Notes for Figure 6H-6—Typical Application 6 <br />Shoulder Work with Minor Encroachment <br />Guidance: <br />1. All lanes should be a minimum of 10 feet in width as measured to the near face of the channelizing devices. <br />2. The treatment shown should be used on a minor road having low speeds. For higher-speed traffic conditions, <br />a lane closure should be used. <br />Option: <br />3. For short-term use on low-volume, low-speed roadways with vehicular traffic that does not include longer <br />and wider heavy commercial vehicles, a minimum lane width of 9 feet may be used. <br />4. Where the opposite shoulder is suitable for carrying vehicular traffic and of adequate width, lanes may be <br />shifted by use of closely-spaced channelizing devices, provided that the minimum lane width of 10 feet is <br />maintained. <br />5. Additional advance warning may be appropriate, such as a ROAD NARROWS sign. <br />6. Temporary traffic barriers may be used along the work space. <br />7. The shadow vehicle may be omitted if a taper and channelizing devices are used. <br />8. A truck-mounted attenuator may be used on the shadow vehicle. <br />9. For short-duration work, the taper and channelizing devices may be omitted if a shadow vehicle with <br />activated high-intensity rotating, flashing, oscillating, or strobe lights is used. <br />10. Vehicle hazard warning signals may be used to supplement high-intensity rotating, flashing, oscillating, or <br />strobe lights. <br />Standard: <br />11. Vehicle-mounted signs shall be mounted in a manner such that they are not obscured by equipment <br />or supplies. Sign legends on vehicle-mounted signs shall be covered or turned from view when work is <br />not in progress. <br />12. Shadow and work vehicles shall display high-intensity rotating, flashing, oscillating, or strobe lights. <br />13. Vehicle hazard warning signals shall not be used instead of the vehicle’s high-intensity rotating, <br />flashing, oscillating, or strobe lights. <br />Guidance: <br />14. All advance warning signs should be placed so that the path of travel for bicycles is not blocked, while maintaining <br />visibility for road users. <br />15. When existing accommodations for bicycle travel are disrupted or closed in a long-term duration project (see Section <br />6G.02) and the roadway width is inadequate for allowing bicyclists and motor vehicles to travel side by side, the Bicycle <br />Warning (W11-1) sign and the SHARE THE ROAD (W16-1P) plaque should be used to advise motorists of the <br />presence of bicyclists in the travel way lanes. <br />16. Except for short durations and mobile operations, when a highway shoulder is occupied and bicyclists would be sharing <br />a lane with vehicular traffic, as a result of the TTC zone, speed reduction countermeasures should be used to reduce <br />traffic speeds in the TTC zone. Refer to Sections 6C.01 and 6D.03. <br />17. Except for short durations and mobile operations, when a highway shoulder is occupied and bicyclists would be sharing <br />a lane with vehicular traffic, as a result of the TTC zone, before narrowing the outside lane other measures such as <br />widening the outside shoulder to allow bicyclists and motor vehicles to travel side by side through the TTC zone should <br />be considered. <br />18. If traffic volumes make it feasible, the two left lanes should be merged into one lane to avoid using the shoulder as a <br />traveled way lane and allowing continued use for emergency purposes and bicycle travel. <br />19. When existing accommodations for bicycle travel are disrupted or closed in a long-term duration project (see Section <br />6G.02) and the roadway width is inadequate for allowing bicyclists and motor vehicles to travel side by side, a separate <br />path should be considered for bicyclists.