Answer: Drivers
Clues: “Operate” and “Vehicle”
“Consumer Affairs” analyzed data from the Department of Transportation and the National Highway Transportation Safety Administration.
Then, they ranked cities based on four factors: Crash fatalities per 100,000 people, the number of fatalities due to bad driving, DUI and speeding.
“Bad driving” included stuff like: Driving the wrong way in one-way traffic, failing to yield , aggressive / careless driving, making improper turns and recklessly changing lanes and tailgating on busy roads.
In the end, the U.S. city with the worst drivers is: Waterbury, Connecticut. Milwaukee has the 25th worst drivers.
The city with the best drivers is Salinas, California.
(ConsumerAffairs.com has the full ranking. According to their map, the cities with the worst drivers generally seem to be focused in the South.)