i got a tom tom xl340 IQ Routes Edition it displays my speed when im traveling in my car it says im only doing 46 when my speed o says im doing 50ks. so i check the GPS accuratey aginst the speed signs. that you see on that side of the road that say 'Your Speed Is'. and the GPS will say the same speed as the speed sign that works by radar. now when im on the highway in the 100k zone my speed o will say im doing 110k but my GPS will say im doing only 100.
what one should i go by the GPS or the speed o?
[Moderator edit (MF): edited spelling on subject]