Speed and distance are harder to judge
							                                
                                        
                                    
							                        
                    
                            Every driver will normally be tired
							                                
                                        
                                    
							                        
                    
                            Most towns aren't adequately lit
							                                
                                        
                                    
							                        
                    
                            Large vehicles are subject to a 10% speed reduction
							                                
                                        
                                    
							                        
                     
	 
	