the private car remains the principal method of transport for most people.
I'm not sure that this is true,
in the parts of the country where bus lanes are prevalent.
Google suggests that dublin bus carries 350-400k people per day.
we should make the best use of the resources we have
The luas' cobbles must be brutal for the suspension
Our city roads are a limited resource
The limiting factor in our cities' traffic flow isn't road capacity, it's
intersection capacity. Getting passengers through intersections is the game, and a full bus is
phenomenally efficient at it. A busy 12m dublin bus is worth 250m of bumper-to-bumper commuter cars. If you want to make a city hum, you fill as many buses as you can, and you fire them through the network as fast as you can. Put
cowcatchers on the front if you have to.
Even so, bus lanes stop short of busy intersections - flow is rarely restricted by leaving a "useful" stretch of lane empty. At such, empty bus lanes have little/no impact on flow, but they can return huge gains when they deliver buses to intersections more quickly.
only one bus every ten minutes
Are there no taxis/bikes at your end of town?
There's a chicken and egg situation - making buses/bikes faster takes commuter cars off the road. On the other hand, if my bus is going to be stuck behind cars all day, I might as well throw my own car into the fray and idle in a fancier seat.