[omniglottal]

Disregard the price of your purple line, for I, a taxpayer, paid for the road you wish to paint. My car registration fees paid for it too. Don't dare assume it's OK to prevent me from driving on this public infrastructure. A couple year ago, politicians reduced a central thoroughfare through our city from two lanes to one, where a dedicated lane now exists for busses. This was profoundly unpopular and has increased congestion. Which of the one remaining lanes would you like to paint purple now?

[danielvaughn]

Expand your horizon farther into the future. Imagine a world where the majority of vehicles have driverless capabilities. If you were to reserve a lane for automated traffic, it would significantly improve congestion and could lead to fewer lanes being needed at all.