What is 3-in-1 method?

Maybe some of us may not know what is 3-in-1 method, and keep asking about it. Basically 3-in-1 is a method which means there should be minimum 3 person in one car, in some 3-in-1 areas and in a certain period of time. some of people keep asking will this method reduce too many vehicles? It is a big yes, this method will effectively reduce too many vehicles on road if the government does it strictly, jockey is not allowed in Singapore. how about sport car? a good question has been asked by some of my friends, our final solution is actually a combination of 3-in-1 method and increasing the minimum age of driving license. we use a scanner and a detector, we put the scanner on the dashboard of the car. for everyone that buy a sport car, they should register their scanner, so every time they pass 3-in-1 area the minimum people will change into 2 people.