I commute by cab everyday, and finding proper change is a HUGE pain. While I do waste 2-4mins per ride on average, I have wasted 10 mins couple of times since n

I commute by cab everyday, and finding proper change is a HUGE pain. While I do waste 2-4mins per ride on average, I have wasted 10 mins couple of times since no change was available at all. Most of the time, the delay is fine. But when you are in a hurry, it is very painful. There is a simple solution that addresses the UX, the pain and the RBI regulation - pre payment. I make pre-payments once in a while, and the cost of my rides gets deducted from it.