The city can't support the 30k cars that would be needed for the people taking tech busses (no room to park that many cars).. so if we stopped the tech busses some of those people would move closer to work without busses; others would take Caltrain. Both of those things would reduce congestion, and pollution more than tech busses.

We don't know the exact number that this would reduce because the tech bus legislation passed without the environmental study that is required (hence why there is a lawsuit right now).