Which of the following evaluates the speeds of vehicles based on scientific data?

Traffic studies are specifically designed to collect and analyze data on vehicle speeds, traffic volume, and other related parameters. They utilize systematic methods and often involve sophisticated equipment to gather scientific data about how fast vehicles are traveling on various roads. This evaluation is critical for developing traffic management strategies, improving road safety, and implementing effective law enforcement measures.

Public surveys, while they can provide some information regarding driver perceptions or behavior, do not offer the empirical data necessary for accurate speed assessments. Speed traps primarily involve law enforcement tactics to identify and ticket speeding vehicles, lacking the broader scientific analysis aspect. Vehicle registrations track ownership and vehicle details but do not measure vehicle speeds. Hence, traffic studies stand out as the option that directly evaluates speeds based on scientific data.