GPS and location systems designed for driving will 'snap' to the correct side of the road. They're aware of what they're being used for and optimise for that.

GPS and location systems designed for driving will 'snap' to the correct side of the road. They're aware of what they're being used for and optimise for that. Similarly, because driving is 2D solution instead of 3D, the altitude will be used derived from the map, not the signal. Which is why GPS systems designed for driving are fundamentally not suitable for use in (say) planes which need a true 3D solution.