A lone woman lugging a baby and groceries ducks out of her lighted garage. As the door shuts behind her, the sidewalk illuminates of its own accord and the gate swings wide. She eases through it, hearing her front door unlock with an audible click. This and a live security camera ensure woman and child an anxiety-free passage to the sanctuary of their home. Sultry Coltrane music fades up, and she smiles …