The Sentry system is in commercial use in the cities of Bridgeport CT, Cedarhurst NY, Flint MI, and Vancouver BC. The following cities have also tested the technology and are in various stages of evaluating or rolling it out: Austin TX, Boston MA, Bloomfield NJ, Cedar Rapids IA, Chelsea MA, Dubuque IA, Grand Junction CO, Hartford CT, Hamtramck MI, Holyoke MA, Indianapolis IN, Lodi CA, Lowell MA, New Britain CT, New Haven CT, New Orleans LA, Plymouth MA, St. Paul MN, San Antonio TX, Royal Oak MI, Minneapolis MN, and Worcester MA.