I think it is "the" area being searched. My understanding is NW Springville Road is one of the back roads in the area where TMH originally said she was driving to sooth her 18 month old. So, this is the area where she placed herself between 10:10 am and 11:39 am.
It could be described as the back roads area between Skyline School and her "shopping" area. It includes the area where DDS was gardening that day. Also, the gym where she eventually showed up at 11:39 am is in her "shopping" area--causing her to back track, I guess. Pretty strange.
I thanked your comment but I wanted to quote it to express my thanks again. This helps so much. Please don't hesitate to point out anything you think I have wrong on my insert below.
I would say it is a little bit out of the way and I think LE can place her in the area as they collected video surveillance from many, many stores and businesses and any private residences in the area that had surveillance available.
If you click on the above, it will enlarge and the boxes become readable. The black circle is the approximate area that I think they are focused on. Some of this area my have been searched very early on, but I'm so glad they are looking again and perhaps expanding it.