External GPS receiver with the App, possible?
I recall that some sat navs have a "snap to road" facility but if TT has this then the real location and TT's location are too far apart for it to be useful.
Given the problem may have more to do with my phone's GPS signal reception, I investigated using my old external GPS receiver that I used with TT Nav app in my iPAQ until a few years ago. I have successfully linked it to my phone and mocked my location through it.
Does TT use the overridable Android GPS location provider or does it use the GPS location direct from the phone hardware? Some apps, for example GPS Status appear just to use the phone's.