Poor traffic signal timing results in traffic delays that can create stress for many travelers. To gauge traffic signal operations, the National Transportation Operations Coalition (NTOC) conducted a national assessment to develop the first-ever National Traffic Signal Report Card. The Traffic Signal Operation Self-Assessment was administered in August 2004 and voluntarily completed by 378 agencies in 49 states, representing about one-third of traffic signals in the United States.

The traffic signals were graded according to the standardized report card that includes five sections (Proactive Management, Signal Operation in Coordinated Systems, Signal Operation at Individual Intersections, Detection Systems and Maintenance). In addition, the report card assigns an overall score.

The report concluded that in order to achieve the desired A- level of traffic signal performance, more sustained resources must be devoted to signals and the professionals who design, operate and maintain them.

The report stated that excellence in traffic signal operation involves three components:

1. Reasonably current traffic signal hardware ($10,000 each. Nationwide signal controllers: $265 million annually.)

2. Routine timing updates (Updating signal timing costs $3,000 per intersection every 3-5 years. Nationwide investment in signal timing: $159-$265 million.)

3. Sound maintenance practices (Annual maintenance personnel investment should be about $500 million per year.)

To obtain an A rating, the report recommends a a national investment be made in the three components mentioned above, resulting in a total investment of $965 million per year.