Traffic engineering is that phase of engineering that deals with the planning, geometric design and traffic operations of transportation systems including roads, streets, highways, sidewalks and bicycle lanes for the achievement of safe, efficient and convenient movement of people and goods. As trained professionals, traffic engineers need to base their recommendations by studying existing and future conditions under a number of scenarios. As part of these efforts, traffic engineers take traffic counts, analyze accident statistics, study speed data, examine roadway conditions, conduct research and study what other professionals are doing and the results they have achieved. Millions and multi-millions of dollars are typically spent based on the findings and recommendations of traffic engineering studies. This webinar provides an introduction to the multitude of studies and measurements performed by traffic engineers and transportation planners as part of their work, and some of the pitfalls to be aware of when performing certain types of traffic engineering studies.