Weird Behaviour near Via Points.
Posted: Fri May 26, 2023 11:14 am
This isn't a complaint or a cry for help. It is just for amusement now I have nothing better to do - recent observations.
I have noticed recently when looking at the RUT behaviour, that sometimes routing behaviour seems very odd, especially close to Via Points.
Here are a few examples that I spotted and captured. I haven't got a clue what is going on here.
1. Near Harewood House Via Point.
I spotted this after trying to find whether I could Force the XT into a RUT loop, after changing the mImport Byte to 0. I had previousy tried the same route a number of times, and unless the route was created on the XT, A RUT scenario always developed. This route with the nobbled Byte worked perfectly.
I checked it out when I got home. Loaded the same route with the un-nobbled Byte anf foced it to recalculate by skipping the first route point after the start. It displayed the same thing. A loop around a crescent. So it has nothing to do with RUTs or nobbled mImport bytes. There was no demand to turn rigt (I was travelling from the top of this map) to the via point flag. There was no demand to turn right - and the magenta line was a darker shade - as if it wasn;t part of the route at all. I checked that it was still heading for the Via. It was.
Curious.
----------------------
2. Near Hawes. This was during the Yeehaah route when I tested the nobbled Byte for the first time - which was successful.
The Via Point was marked ahead - my exit via point from Hawes, about 2 miles behind this screen shot. I am travelling from bottom right to mid left, and have yet to reach the Via Point. When I did reach it, it asked me to turn right. A clever trick if I can do it - a steep roadside banking, a dry stone wall and a field full of sheep. There in no road there, and never has been. For some reason it is tring to get me to go a short way down the road off the B6255 - Lanacar Lane, and then turn back to continue on the road that I am on.
As it happened, I could not go any further the road ahead was closed - some poor soul had come off his motorbike and ambulance and police were in attendance. We had to double back into Hawes and go up Lanacar Lane anyway. Did it know ? But the routing across the field is weird.
-------------------------
3. Same Via Point - Previous Test of RUT behaviour.
This is the same Via Point on a completely different day and a completely different test. I had plotted a BAsecamp route which BC achieved in the way that I wanted to go with just 2 Via Point other than start and finish. My intention, and the way that BC had plotted it was to first ride to Hawes, and then through this Via Point a couple of miles outside Hawes. When I skipped a very early Via Point (before the two points I mentioned), the route recalculated and it wanted to take a faster way to reach 13 XT3 04 B6255 from Hawes. It was going to approach it from the other direction.
I stuck to my planned route and eventually, the XT gave in (or so I thought). It plotted a route in the direction I was heading to the Hawes Via Point. I knew that something was odd with the milage it was reporting. (see next screenshot), but tat this stage wasn't sure what. I pressed skip in order to see where it thought that it was heading. Its heading for the correct Via.
The screenshot above is AFTER I passed the Via Point. There was no announcement, and the flag stayed on the screen. The Trip Data on the right reveals all. The Via Point that it is heading for (the one just behind me) is 30 miles ahead and it will take me 46 minutes to reach it.
What it is doing is heading for Ingleton 15 miles away, where it will find a crescent to turn around (I had U turns disabled), and come back 15 miles to pick up the via point from the other direction.
I'm not sure what is going on here - it may be aiming for its original route and there aren't any places to turnround without doing a U turn. I really hope it has not marked the Via as needing to be approached from the correct direction. I think it is RUT related - something which we now know how to avoid.
------------------
I have noticed recently when looking at the RUT behaviour, that sometimes routing behaviour seems very odd, especially close to Via Points.
Here are a few examples that I spotted and captured. I haven't got a clue what is going on here.
1. Near Harewood House Via Point.
I spotted this after trying to find whether I could Force the XT into a RUT loop, after changing the mImport Byte to 0. I had previousy tried the same route a number of times, and unless the route was created on the XT, A RUT scenario always developed. This route with the nobbled Byte worked perfectly.
I checked it out when I got home. Loaded the same route with the un-nobbled Byte anf foced it to recalculate by skipping the first route point after the start. It displayed the same thing. A loop around a crescent. So it has nothing to do with RUTs or nobbled mImport bytes. There was no demand to turn rigt (I was travelling from the top of this map) to the via point flag. There was no demand to turn right - and the magenta line was a darker shade - as if it wasn;t part of the route at all. I checked that it was still heading for the Via. It was.
Curious.
----------------------
2. Near Hawes. This was during the Yeehaah route when I tested the nobbled Byte for the first time - which was successful.
The Via Point was marked ahead - my exit via point from Hawes, about 2 miles behind this screen shot. I am travelling from bottom right to mid left, and have yet to reach the Via Point. When I did reach it, it asked me to turn right. A clever trick if I can do it - a steep roadside banking, a dry stone wall and a field full of sheep. There in no road there, and never has been. For some reason it is tring to get me to go a short way down the road off the B6255 - Lanacar Lane, and then turn back to continue on the road that I am on.
As it happened, I could not go any further the road ahead was closed - some poor soul had come off his motorbike and ambulance and police were in attendance. We had to double back into Hawes and go up Lanacar Lane anyway. Did it know ? But the routing across the field is weird.
-------------------------
3. Same Via Point - Previous Test of RUT behaviour.
This is the same Via Point on a completely different day and a completely different test. I had plotted a BAsecamp route which BC achieved in the way that I wanted to go with just 2 Via Point other than start and finish. My intention, and the way that BC had plotted it was to first ride to Hawes, and then through this Via Point a couple of miles outside Hawes. When I skipped a very early Via Point (before the two points I mentioned), the route recalculated and it wanted to take a faster way to reach 13 XT3 04 B6255 from Hawes. It was going to approach it from the other direction.
I stuck to my planned route and eventually, the XT gave in (or so I thought). It plotted a route in the direction I was heading to the Hawes Via Point. I knew that something was odd with the milage it was reporting. (see next screenshot), but tat this stage wasn't sure what. I pressed skip in order to see where it thought that it was heading. Its heading for the correct Via.
The screenshot above is AFTER I passed the Via Point. There was no announcement, and the flag stayed on the screen. The Trip Data on the right reveals all. The Via Point that it is heading for (the one just behind me) is 30 miles ahead and it will take me 46 minutes to reach it.
What it is doing is heading for Ingleton 15 miles away, where it will find a crescent to turn around (I had U turns disabled), and come back 15 miles to pick up the via point from the other direction.
I'm not sure what is going on here - it may be aiming for its original route and there aren't any places to turnround without doing a U turn. I really hope it has not marked the Via as needing to be approached from the correct direction. I think it is RUT related - something which we now know how to avoid.
------------------