This report, based on a review of ongoing and completed research, reflects the experience of more than 200 bus priority treatments in the United States and elsewhere. The types of treatments, the number of people they serve, and the design details they utilize vary widely. Treatments can be grouped into three broad categories: those relating to freeways, arterials, and terminals. Most bus priority treatments consist of reserved bus lanes on downtown city streets. Bus-ways and other freeway-related treatments are ground or proposed mainly in large U.S. cities with rail transit systems, large downtown employment, and/or heavy peak-hour transit use. The importance of ramp metering, downtown distribution facilities, fringe parking effective enforcement of arterial buslanes, and the importance of allowing for future conversion to other systems are also discussed.