To honestly compare the efficiency of cars you have to consider that the car might weigh 2000kg, but when it’s only transporting a 100kg occupant you have to divide the efficiency by 20. Only when you’re fully utilizing the vehicle to transport many passengers and cargo are you going to approach the efficiency values on the graph. All the vehicles have the same problem, they assume you’re not just trying to get to the destination, but that you also want to bring your mobile living room (with couch and recliners and HVAC system and a storage locker) to the destination as well.
By comparison, walking has the full efficiency since you’re transporting yourself in full to the destination.
To honestly compare the efficiency of cars you have to consider that the car might weigh 2000kg, but when it’s only transporting a 100kg occupant you have to divide the efficiency by 20. Only when you’re fully utilizing the vehicle to transport many passengers and cargo are you going to approach the efficiency values on the graph. All the vehicles have the same problem, they assume you’re not just trying to get to the destination, but that you also want to bring your mobile living room (with couch and recliners and HVAC system and a storage locker) to the destination as well.
By comparison, walking has the full efficiency since you’re transporting yourself in full to the destination.