To prevent rain from entering the vehicle's braking system
							                                
                                        
                                    
							                        
                    
                            To allow for an increased stopping distance
							                                
                                        
                                    
							                        
                    
                            To let other motorists move into the gap
							                                
                                        
                                    
							                        
                    
                            To reduce the risk of water spraying into the filters
							                                
                                        
                                    
							                        
                     
	 
	