If I remember correctly, bus rapid transit, when fully implemented, can have better value for cities, especially those in poorer countries where the upfront investment for large infrastructure is too high. It can move a lot of people with large articulated buses that run at very high frequency. They don’t need tracks and allow the line to run even if one bus is down (a major drawback for rail transportation). Anyway, always good to spread the very real advantages of urban rail transportation.