Routing

[center]

I realize that due to the vagaries of time and space the routing algorithm does not always find the absolute quickest or shortest route but listen to this.
I recently traveled from my home (Dearborn Mi.) to Chatham Ont., depending on traffic and if there are no delays at the border this should take less than 90 minutes. This time it took me about 75 minutes.
Betty wanted to send me through Sarnia to London and back to Chatham. This is easily 3 1/2 to 4 hours. Even after I crossed the border she tried sending me on the Sarnia-London-Chatham route. I was half way between Windsor and Chatham before she routed me directly to Chatham. Coming back she started out slightly better; she tried to send me through Sarnia without going to London first, but all of her recalculations on the trip back kept trying to route me through Sarnia, even when I was right at the Ambassador Bridge in Windsor (This is less than 20 minutes from my house-going up to Sarnia and back to my house from this spot would take at least 2 hours). She never routed me straight home until after I had crossed the border.
The REALLY odd thing is that I have made this trip with Betty at least three other times and she pretty much routed me through Windsor. So does anyone have a clue as to why the change?

Ken

[AlanJ]

Reading your post its hard to believe you are talking about Canada, all those place names are English Towns/Cities, nice to know the 'Mother Country' is well looked after in the way of Town/City names..:)

[Q-Eye]

Have you changed which maps are loaded since Betty last correctly routed you? Your description sounds like what happens when you have a missing detailed map along your route. Betty gets very confused and makes "interesting" routing choices when trying to mix detailed and base maps in a route. Sometimes a tiny corner of a map may contain the missing piece of your route. Zoom in and make sure the whole route is covered.

[apersson850]

If that indeed is the case, then a knows way of circumventing the problem when crossing from detailed to basemap, or vice versa, is to place via-point at the map boundaries.
That forces Betty to calculate the trip on one type of maps at a time, thus avoiding a lot of the "interesting" routes.

[reinbeau]

Ken, I have no idea why Betty has routed you all around that portion of Canada, but you've brought me back about 40 years to when I used to summer in Marine City with my grandparents, we went through Sarnia to get to the Blue Water Bridge into Port Huron and drove down the St. Clair River to Marine City. When we left we always took the ferry over to Sombra. Boy do I miss my grandparents, I love Michigan. Thanx for the memories! :)