To reduce traffic speed
							                                
                                        
                                    
							                        
                    
                            To allow pedestrians to cross
							                                
                                        
                                    
							                        
                    
                            To separate lanes of traffic
							                                
                                        
                                    
							                        
                    
                            To increase traffic speed
							                                
                                        
                                    
							                        
                     
	 
	