Same trip, different route

ascsbe · Posted: Sun Apr 22, 2007 6:59 pm Post subject: Same trip, different route

Hi. Today I have been from my house in Wimborne to Cirencester, i keyed the address in and all went well. When leaving there this afternoon I pressed home and it came up with a completely different route. I had not altered any settings. Any reasons, the timings and mileage were almost the same.
Andrew

mikealder · Posted: Sun Apr 22, 2007 7:08 pm Post subject:

Possibly one way systems, or the number of right turns vs left etc, obviously turning right across a major road on average will take longer in time than turning left. The routing engine will use a number of factors to work out the quickest route, it is far more complex than just the two examples I give as a possible reason - Mike

ianb11 · Lifetime Member Joined: Apr 08, 2007 Posts: 37

Same here a couple of times:

I went from Lancs to Arbroath & when I set off back it sent me a completely different way via back roads insted of main A roads.

sgould · Frequent Visitor Joined: Oct 05, 2004 Posts: 1320

Like this one?

It doesn't do it anymore with the 6.75 mapping.
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andydigital44 · Regular Visitor Joined: Mar 29, 2005 Posts: 193

Just because a certain route is the quickest on one direction doesn't necessarily means its going to be the quickest in the opposite direction, seems like common sense to me.

DennisN · Posted: Sun Apr 22, 2007 9:08 pm Post subject:

When I went to the Expo (or rather Holiday Inn at Shepperton), the GO700 map 675 gave me a different route from the GO710 map 675 - east along M4 to M25, then 700 said get off at J13 whereas GO710 said stay on M25 a bit further. Difference of a couple of miles, couple of minutes. Question

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If it tastes good - it's fattening.

Two of them are obesiting!!

mikealder · Posted: Sun Apr 22, 2007 9:19 pm Post subject:

The thing to ask though in each case did it get you to the correct destination and back home without going down a one way street the wrong way? or trying to take you down a public footpath? (these are worth noting and submitting to the map suppliers so we all benefit from a more accurate map in the future).

In most cases the answers to the above will be that it worked fine but might have given a different route, as I said earlier this can be down to a number of different things when it plans a route - if it gets you their to the planned destination, then its done its job - Mike

Anita · Posted: Sun Apr 22, 2007 9:21 pm Post subject:

DennisN · Posted: Sun Apr 22, 2007 9:43 pm Post subject:

Half hour ago I received a PM from someone who seemed genuinely upset by it. It was a joke to me, but in view of my huge dentistophobia I could understand that it would give some a real horror trip. No desire to cause real offense, so out it goes and the quest for a new one starts here. I may try Mr Happy's big woolly rabbit.

But you might have signed yours "From a secret Admirer" with a big X. Twisted Evil

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Dennis

If it tastes good - it's fattening.

Two of them are obesiting!!

Anita · Posted: Sun Apr 22, 2007 9:59 pm Post subject:

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