In which document can you find information on warranting traffic signals?

• A. AASHTO Green Book
• B. MUTCD
• C. Institute of Transportation Engineers Manual
• D. Traffic Safety Manual

Answer: (B)

The Manual on Uniform Traffic Control Devices (MUTCD) is the authoritative document that contains guidelines and standards for traffic signals, including the criteria for when they should be warranted. Warranting traffic signals refers to the conditions under which a traffic signal should be installed at an intersection, and the MUTCD outlines specific studies and analyses that need to be performed to justify their installation.

The AASHTO Green Book, while it provides guidance on geometric design and other roadway considerations, does not specifically address the warranting of traffic signals. The Institute of Transportation Engineers Manual offers insights into various traffic engineering practices, but it is not the standard reference for traffic control devices. The Traffic Safety Manual focuses more on safety aspects and risk factors associated with road users rather than the specific guidelines for traffic signal installations. Thus, the MUTCD stands out as the primary resource for warranting traffic signals, providing the necessary criteria and supporting information.