Ideas for final design

After 101 solutions has been listed, it came out with 3 different ideas to be developed as the final solution to reduce the too many vehicle's problem.

But then, after doing some discussion, the 3 ideas above were cut down into 2 ideas, which are 3-in-1 method and increasing the minimum age of driving license become 19 years old, these two combination were found as the best ideas that can be applied in Singapore.