How is traffic data typically collected for analysis?

Traffic data is typically collected for analysis using a combination of automated counters and manual observations. Automated counters, which can include devices like inductive loop sensors or infrared sensors, provide continuous and accurate data on the volume and speed of vehicles passing a specific point. These systems can operate around the clock, offering a comprehensive and efficient means of data collection over long periods.

Manual observations complement this automated data by allowing technicians to gather qualitative insights that may not be captured by machines—such as driver behavior, specific traffic patterns, or unusual incidents. Combining these two methods enables a more robust analysis of traffic flow, safety, and overall infrastructure usage, making it possible to make informed decisions for traffic management and planning. The other methods mentioned, such as relying solely on eyewitness accounts, surveying local residents, or using mobile application data, do not provide the same level of accuracy or comprehensiveness as the automated and observational approach.