They are acknowledging the driver's presence
							                                
                                        
                                    
							                        
                    
                            They are checking for traffic behind them
							                                
                                        
                                    
							                        
                    
                            They intend to pull out, turn right, or change direction
							                                
                                        
                                    
							                        
                    
                            They are about to stop