Air Pollution Control
Make sure that exhaust pipes open in front of the vehicle and not behind them. Essentially they should cause visibility problems for the driver, if the vehicle is polluting. I will like to believe that most people pollute because they don't even know. This fixes the problem of at least knowing when to get things checked. Also with this approach pollution is no longer someone else's problem. It has some implications for the driver also (reduced visibility).
Noise Pollution Control
This is mostly caused by needless pressing of horns. And the reason some of the people keep pressing them most of the time is because it is so damn easy to press it. The idea is to replace the "button" for horn, with a "voice activated" horn. Essentially if someone wants to honk, he needs to shout. The "voice detector" will sound the horn and the intensity will depend upon the intensity of the "shout". Why does this works? How loud can one shout and how long can one continue to shout loudly? Basically we have made "horn" a finite resource, to be used judiciously.
Lane jumping is not really a problem unless it requires others to apply breaks. The problem with lane jumping is that the one jumping the lane is likely to end up appreciating his skills rather than being thankful to the thoughtfulness of the one who breaks. We have good breaks in cars and they don't make much noise. If we could add that noise back, may be a bit amplified, we at least let the lane jumpers know what they have caused. The silent breaks make it impossible to provide correct feedback to the lane jumpers. Honking doesn't quite have the same meaning because it has a questionable human element.
Safe Pedestrian Crossing
Pedestrian crossings are safe when they exist. The problem is the absence of them at so many places, making it very risky for people to cross roads. The solution here is to have coin operated traffic lights for pedestrians - just like "sulabh souchlaya". Some way to generate enough money to justify investments from say pubic-private-partnership.