Problem 6: Discussion

What did we learn in this problem? We learned how to apply the Quick Estimation Method (QEM) to evaluate signalized intersection performance characteristics. We also learned that the QEM provides a reasonable estimate of intersection sufficiency on the basis of minimal data, including the approach turning movement volumes, the approach lane configurations, and the anticipated method for managing left turns. We saw that the method is a pretty good way to see whether any geometric improvements will be necessary to accommodate the anticipated travel demands, particularly when working with future travel demand estimates that have a significant and inherent amount of uncertainty associated with them. Finally, we noted how judgment and critical review is still necessary even when applying the QEM results in order to assure that appropriate conclusions are reached.