CA MUTCD 2014 r8 Pt 6

About This Book

The California MUTCD 2014 Edition, Revision 8 – Part 6: Temporary Traffic Control (TTC) is Caltrans' state-adopted manual establishing standards, guidance, and typical applications for managing road users through work zones, maintenance areas, and incident sites on California streets and highways. It is based on the FHWA's MUTCD 2009 Edition (Revisions 1–3), amended and supplemented for California law.

Key Components of Part 6

• Chapter 6A – General: Purpose and design philosophy of temporary traffic control.
• Chapter 6B – Fundamental Principles: Core rules covering road user safety, worker safety, clear guidance, and routine work-zone inspections.
• Chapter 6C – TTC Elements: Requirements for TTC plans, taper lengths, sign spacing, and traffic flow transitions (merging, shifting, and termination tapers).
• Chapter 6D – Pedestrian and Worker Safety: High-visibility apparel (ANSI/ISEA compliant), safe pedestrian detours, and accessibility maintenance around work sites.
• Chapter 6E – Flagger Control: Certified flagger training, proper STOP/SLOW paddle use, and station positioning.
• Chapter 6F – TTC Device Specifications: Orange fluorescent signs with black legends; minimum mounting heights of 5 ft (rural) and 7 ft (urban/commercial); channelizing devices with retroreflective striping (18–42 in. depending on speed); PCMS visible from ½ mile; arrow boards dimmed 50% at night; all devices must meet NCHRP 350 or MASH crashworthiness standards.
• Chapter 6H – Typical Applications (TA): Standard diagrams for real-world scenarios, including TA-3 (shoulder work), TA-10 (lane closures with flaggers), TA-21 (intersection lane closures), and California-specific modifications such as TA-38 deletions and double-lane closures.