When a streetlight turns yellow, ... the ABC15 Investigators have checked in with Phoenix leaders who planned to retime every intersection in the city.

Outsiders wonder how Phoenix can exist in desert heat with limited water. But it's always adapted as it's grown to become the 5th-largest U.S. city.

Outsiders wonder how Phoenix can exist in desert heat with limited water. But it's always adapted as it's grown to become the 5th-largest U.S. city.

Outsiders wonder how Phoenix can exist in desert heat with limited water. But it's always adapted as it's grown to become the 5th-largest U.S. city.

Outsiders wonder how Phoenix can exist in desert heat with limited water. But it's always adapted as it's grown to become the 5th-largest U.S. city.

Outsiders wonder how Phoenix can exist in desert heat with limited water. But it's always adapted as it's grown to become the 5th-largest U.S. city.

In metro Phoenix, yellow cars had the lowest depreciation rate, at 23%. "Yellow cars hold their value the best," according to the study results. So if you're looking for a new vehicle, this may be ...