From the website:
Roadsafe Traffic Systems services cover Boston MA, Richmond VA, Washington DC, Charleston SC, Miami FL, Tampa FL, Ft. Myers FL, Atlanta GA, Nashville TN, Memphis TN, Louisville KY, Cincinnati OH, Indianapolis IN, Chicago IL, Peoria IL, St. Louis MO, Kansas City KS, Tulsa OK, Des Moines IA, Rockford, Denver CO, Phoenix AZ, Las Vegas NV, Reno NV, Tucson AZ, Flagstaff AZ, Houston TX, Austin TX, El Paso TX, Iowa City IA, Oklahoma City OK, Salt Lake City UT, Colorado Springs CO