Q: What restriction applies to a category B provisional licence holder?
        
        
            
                Correct answer:
                
                    They can't drive unaccompanied
                
             
        
            
                Explanation
            
            
                Motorways mustn't be used by any of the following: pedestrians; holders of provisional motorcycle or car licences; riders of motorcycles under 50 cc; cyclists; horse riders; agricultural vehicles; powered wheelchairs/powered mobility scooters; certain slow-moving vehicles and those carrying oversize loads (except by special permission).