Knowledge Center

State and local agencies have collectively invested an estimated $122.4 billion in the planning, design and construction of signalized intersections. The estimated ongoing annual operating and maintenance expenditure is about $1.23 billion, with an annual a

Value of the Self-Assessment

The 2018 Traffic Signal State of the Practice Report characterizes the state of the infrastructure and the organizational practices that support the management, operation and maintenance of the signalized intersections. The data, and report

This guide is provided to inform traffic engineering managers of a general audit process that can be used to evaluate the effectiveness of their program management of traffic signal and associated systems. An audit is performed to verify that people in an organization are doing what they planned

The Traffic Signal Operations Self Assessment is a tool to allow agencies to compare themselves with a composite of traffic signal operations best practices from agencies around the United States. Responses to the 2011 Traffic Signal Operations Self Assessment that were received by March 7, 2012

The latest national traffic signal assessment conducted by the National Transportation Operations Coalition (NTOC), a group of transportation associations, shows that gradual but steady progress is being made on the management and operation of traffic signals despite continued funding challe