Travelling along the A49 between Shrewsbury and Leominster the navigation voice told me time and time again " In 700 yards keep left " and further again " In 500 yards keep right for 5 miles " when on same road. The commands seamed to but not all time coincide with lay byes and junctions adjoining the route I was on. I had to switch it off in the end, so annoying. 

Yeah, but have you seen the number of holes in the hedge on that road? 

My sat nav has a favorite junction off the A34 dual carriageway. When it is set for a destination straight passed Oxford, it always wants me to leave at the Oxford exit up the slip road, then take the second exit off the roundabout straight ahead down the slip road. That is of course straight back onto the A34 again! Why does it want me to leave and then rejoin again anyway? I ignore it of course and just stay on the dual carriageway, thinking, "stupid computer". They do strange things sometimes eh.  

After switching the inbuilt navigation off I got the Waze app via the Android app up and running. Completely different, so logical. The only complaint was the loud second sentence volume it made? 

1 hour ago, roaddetective said:

My sat nav has a favorite junction off the A34 dual carriageway. When it is set for a destination straight passed Oxford, it always wants me to leave at the Oxford exit up the slip road, then take the second exit off the roundabout straight ahead down the slip road. That is of course straight back onto the A34 again! Why does it want me to leave and then rejoin again anyway? I ignore it of course and just stay on the dual carriageway, thinking, "stupid computer". They do strange things sometimes eh.  

Can be for one of 2 reasons - either the sat nav thinks that going off and back on is shorter (and hence possibly quicker), or the TMC data is saying the traffic is moving slowly on the road (and hence the roundabout is quicker).

17 minutes ago, PetrolDave said:

Can be for one of 2 reasons - either the sat nav thinks that going off and back on is shorter (and hence possibly quicker), or the TMC data is saying the traffic is moving slowly on the road (and hence the roundabout is quicker).

Sat nav should not be thinking either reason, bloomin tech! The road is always running well and the logical route is to just follow the carriageway. I think it's just trying to mess with my mind. lol Thinking about it though, where it happens there is a slight bend to the left on the carriageway, so if you measure it, maybe leaving and joining again is the shortest route. Never had it happen before with portable sat navs. No real problem though, just strange. 

2 hours ago, roaddetective said:

the logical route is to just follow the carriageway.

Ah but the sat nav isn't logical - if it has wrong data then it will give rubbish suggestions.

 

Remember GIGO (Garbage In Garbage Out).