strange routing on icn 520 can I stick to major roads?

[navmanguy]

Hi
I sometimes use my ICN520 when I am towing my caravan and it comes up with some strange routes.

Sends me through little villages with single car width tracks (supposed to be roads) just to save 2min or 2 mile when I I had stuck on same major road there would have been no problem. Tried all different settings in the routing options but no luck.

When on quickest option all the to the left and the unit cuts me through a village I can force it to keep on the major `A` road with multi trip the route summary can turn out quicker with the multi trip
I thought first couple of times was a one offs but looked into it more and made some routes up to test it and it is like it all the time.

Please help if you can it is making towing worse with it than using a paper map.

Thanks

[navmanguy]

Sorry wrong board

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