Intelligent Sat Nav Systems??

Daisy Turnip writes.....

Are satnav systems that clever?

Tomorrow I’m off to Merthyr Tydfil. I have to be there for 9am!! On checking the online navigation system, the AA tells me, it will take 2hrs and 23 minutes. However, my super dooper sat nav system, it tells me it’ll only take me 1hr 50.

Both systems give me the same route!

Does my satnav system know I’ll drive a little faster than the average, or is there something wrong with one of the systems?

When it comes to setting my alarm when I go to bed in 10 minutes time, which one should I trust? Oh, decisions decisions!