XT2: Section 4 - FoolProof Routing

4.04 - RUT Proof Your Route - Without Trip Manager
So - What is 'RUT' behaviour
The Term RUT is one that I adopted for behaviour that can be described a being 'Stuck in a Rut' - repeatedly following the same monotonous routine. One symptom may be Repeated U Turn requests, but that could arise by missing the start point of a route.

Typically, RUT behaviour will happen on imported routes (eg from gpx files) and is triggered when the route is recalculated - eg after using the Skip button. After that, significant deviations from the route (eg at right angles) are likely to result in RUT behaviour developing. U-Turns requests are perfectly valid if that is the faster way to go. But continued U turn request when it is clear that the way ahead is now faster is a good indication.

The image shows RUT behaviour in progress. I deviated from the route at the A1(M) sign to end up at my current location. The satnav demands that I reverse this route back to the A1(M) label. That is 31 miles to reach a destination 2 miles ahead.

That is RUT behaviour and this particular example is described in fine detail on the XT1 pages - More detail on this example here.
Zumo XT1 example. The XT2 does something similar - but it restricts U-turn demands to just two, after which it looks further ahead before finding a way to turn back - which proved marginally better in some tests.
Example of RUT Behaviour


XT2 : Prevent RUT Behaviour
Surprisingly, it turns out that RUT behaviour never happens if you build the route on the XT1 or XT2 itself. It only happens with imported routes.

You can fool the XT2 into thinking that the route has not been imported - simply by saving a copy of it, and using the Copy button.

Steps:
  • Select your route eg My Route
  • Click the Spanner Tool
  • Select Copy
  • Give it a name eg (@My Route)
  • Load @My Route and use that to navigate instead of the original.
You can do this as soon as you have your routes in the Zumo XT2. Just use the copied version, rather than the original.

nb - You do not have to use the @ symbol - or any other symbol. I use it simply to alert me to the fact that the route has been copied - and will therefore be RUT-free. '@' comes before 'A' so if the list is in alphabetical order they get sorted to the top. A full stop, would work even better.
Video - Prevent RUT Behaviour


4.04 RUT Proof Your Route - Without Trip Manager