Keeping your driving knowledge up to date When did you last look at The Highway Code? Maybe not since you passed your driving test? And when do you use The Highway Code? Every time you drive your car. You can read the Highway Code on GOV.UK. You can also buy the latest edition from our shop or your device's eBook store, or download The Official Highway Code app for your iPhone. Use the Driver Knowledge Centre on this site to find out what you should know to drive safely and responsibly.