Hello and welcome,
In California on the west coast, flowering ice plant is great for situations like that. A single color like all purple, or mixing colors; either way, the flowering is a nice touch and the ice plant provides a great ground cover and grows slowly. The full sun will guarantee flowering, but too much shade will prevent it.
Not sure about your climate though, maybe it is too cold in the winter for the ice plant? Does it grow naturally on the roadside at all in Maryland? If so, that is a good sign that it will work!
Good luck!