When they are at junctions, roundabouts, or filtering through traffic
							                                
                                        
                                    
							                        
                    
                            When they are stationary
							                                
                                        
                                    
							                        
                    
                            Only at night
							                                
                                        
                                    
							                        
                    
                            In bad weather only
							                                
                                        
                                    
							                        
                     
	 
	