I drive a lot on Motorways and over the past 6 months have seen a lot of 'roof down' Z4's usually driving at about 56mph in either the middle or 3rd lane (if there are 4). This causes congestion and slows lorries and coaches limited to 60mph and can't use the right-hand lane. Anyone care to give me their reason? (you stay out of this enuff_zed, I am looking for serious answers and you make me laugh).