ASE programs have faced some public criticism and therefore are not operated in many states across the country. Currently, ASE programs are operated in only 11 states and Washington D.C., and most of these are located on residential streets and not highways. ASE programs can sometimes fold under the weight of legal, institutional, and political pressures. TSRC’s research explored the potential benefits and barriers to implementing ASE programs in the U.S. Through a literature review and interviews with stakeholders, citizens, and government officials, TSRC provided background on the implementation of ASE programs. The analysis addressed the potential safety and financial effects and any legal restrictions to implementation. TSRC also evaluated key program design choices, addressing such issues as owner versus driver liability, manned versus unmanned systems, mobile versus fixed systems, visibility, location, enforcement thresholds, program management, and revenue distribution.