Indexing Traffic and Transportation

Here's one more Index card (inspired by Jessica Hagy's Indexed).

I think the trend is mainly due to the following reasons:

• In US, rules are more strictly adhered to, especially by truckers and hence they tend to stick to the speed limit (mostly). In India, while all the rules are there, enforcement is less, and more importantly, the punishment for violation is minimal.
• Tata Nano is (as of now) purchased by middle-aged, middle-class folks who can finally afford a car. Hence, they tend to be more conservative in driving.
• Hyundai Santro and the like are the preferred choice for BPO/IT folks, who tend to by 20/30 somethings and hence the speed is more.
  

The beauty is that all the three points (and more) can be simply expressed in the diagram - that's the power of visual thinking.

Here's another one.