Gone are the days of maps - if we're lost, we just grab our smartphone and find a route from there. But now, according to research from uSwitch.com, motorists are relying too much on their Sat Navs to get them from A to B and are driving dangerously as a result. The study found that 78% of drivers use a Sat Nav not only for directions, but also for basic driving hints like speed limits. Motorists are now facing fines of up to £200 for committing minor offences, thanks to their Sat Nav not correcting them. You might know your red from your green light, but do you know these rules of the road?