In this report we summarize results of the analyses and improvement alternatives considered in the federal fiscal year 2017 Low-Cost Improvements to Express-Highway Bottleneck Locations study. We begin by providing background information and citing the purpose of the study. Next, we list the selected study locations, assess safety and operational problems, and discuss potential improvement strategies. In the final section of the report, we present study recommendations. The report contains technical appendices, which describe the study methods and how staff applied the data, and include detailed reports from the freeway merge-and-diverge analyses. If the report’s recommendations are implemented, they should result in improvements on the freeways, such as increased traffic safety, more efficient traffic operations, and reduced congestion at bottlenecks.