Which document should you refer to for lane closure procedures and device types?

• A. The TCP and MUTCD standards, plus state DOT supplements
• B. The Federal Highway Guidebook
• C. The City Traffic Ordinance
• D. The Construction Safety Manual

Answer: (A)

Traffic control in work zones follows national standards implemented through a project-specific plan, with state variations. The combination of the MUTCD standards and a Temporary Traffic Control Plan (TCP), plus state DOT supplements, is the best reference because the MUTCD defines the official signs, devices, and layouts used in lane closures and other work-zone movements, while the TCP specifies exactly how those standards are applied to a particular project, including where devices go and how lanes are closed. State supplements tailor those rules to local conditions, ensuring compliance with any state-specific requirements or preferred practices. The Federal Highway Guidebook offers broad guidance but isn’t the controlling standard; local ordinances may govern certain aspects but don’t provide the comprehensive, nationwide device and procedure requirements; and a Construction Safety Manual focuses on general safety practices rather than the detailed device types and placement used for lane closures.