The term 'Overlap' refers to which concept?

The term 'Overlap' refers to which concept?

• A. Controller sequencing
• B. Signal phasing
• C. Controller output associated with one or more phases
• D. Data overlay

Answer: (D)

Overlap is about combining information from multiple sources into a common frame so you can see how they relate. In practice, overlap refers to data overlay—layering data sets (such as road geometry, traffic counts, or crash data) on the same map or model and looking at where they coincide. This concept lets you analyze patterns and identify areas that deserve attention by examining the merged data, rather than looking at each data set in isolation. The other terms describe how a signal actually operates—the order of phases, the green/yellow/red intervals, or the electrical commands to signal equipment—not the idea of putting data layers together.

Overlap is about combining information from multiple sources into a common frame so you can see how they relate. In practice, overlap refers to data overlay—layering data sets (such as road geometry, traffic counts, or crash data) on the same map or model and looking at where they coincide. This concept lets you analyze patterns and identify areas that deserve attention by examining the merged data, rather than looking at each data set in isolation. The other terms describe how a signal actually operates—the order of phases, the green/yellow/red intervals, or the electrical commands to signal equipment—not the idea of putting data layers together.