Emissions for one. Ever walked or driven behind a city bus in low gear? The diesel exhaust is quite disgusting. Light rail tends to arrive on time more often.

Emissions for one. Ever walked or driven behind a city bus in low gear? The diesel exhaust is quite disgusting. Light rail tends to arrive on time more often. I've been stuck at a bust stop for an hour only to have all 3 scheduled buses arrive at the same time. They were all stuck in traffic. Light rail trends have shown they have a lot of green space around them. Even the space between the tracks is inlayed with grass. A bus line feels temporary while rail stations are permanent. Rail favours development.