[Update: Looking for more parking policy information? Try Reinventing Parking. ] Parking on the door-step (literally) in Hanoi The space efficiency of motorcycles is important for many Asian cities. Traffic engineers usually assume that motorcycles consume about half the road space of a car. In other words, two-wheelers' PCU value is typically given as 0.5 'passenger car units' in heavy traffic. But motorcycle parking can usually squeeze in many more than two machines per car space. These Taipei scooters may be an extreme case. How do they get them in and out? For the forthcoming Asian cities parking study, we found motorcycle parking space norms of up to 10 two-wheelers per car space . Singapore’s parking standards specify perpendicular car slot dimensions and its minimum and preferred size for motorcycle slots. Together these suggest that between 4.6 and 6 motorcycle spaces take the same area as a car space (Land Transport Authority 2005). In India, motor...