There are more people killed on the hard shoulder of a Motorway than in any of the other lanes, people can change their wheels but with the utmost of care, if it's an Off/Side tyre pull as far to the left of the hard should put on your Hazard lights check your mirror if you are getting out of the Drivers side?? Why? I have seen many doors taken off with someone opening that door as a HGV passing & the suction can PULL YOU OUT, that is TRUE, If you have any passengers Exit them ALL from the passenger side & ask them to step well to the left or up the embankment whilst you change the wheel, & change the wheel as quick as you can & keep checking the road behind, it only takes a min to check the state of the traffic but don't take that min COULD cost you your life, when the job is complete & your passengers are back in the car, when re/joining the inside lane speed up to the speed of the traffic do not pull straight out as that again could cost you & others their life.