AAATHE 45. All normal parking restrictions should be observed. Your vehicle  should not be left unattended if it causes an obstruction to other  pedestrians - especially those in wheelchairs. Parking concessions  provided under the Blue Badge scheme (see Further Reading and  Conversions) will apply to those vehicles displaying a valid badge.  46. These vehicles MUST NOT   be used on motorways (see Rule 253).  They should not be used on unrestricted dual carriageways where  the speed limit exceeds 50 mph (80 km/h) but if they are used on  these dual carriageways, they MUST   have a flashing amber beacon.  A flashing amber beacon should be used on all other dual  carriageways (see Rule 220).  highwaycodeuk.co.uk 22  alternative route. Similarly, when negotiating major roundabouts  (i.e. with two or more lanes) it may be safer for you to use the  pavement or find a route which avoids the roundabout altogether.  Laws RTRA sect 17(2) & (3), & RVLR reg 17(1) & 26 