While on a trip to California I noticed the majority of the public bus operators have either a bike rack installed on the front or the rear of the bus. From what I seen there was a great demand for this service, the rack can carry 2 standard bikes and appear very easy to use (see here). While the introduction of Dublin Bikes in the city centre the demand for such a service in the city center might prove very limited. However in more suburban areas it would provide commuters with a greater opportunity to use public transport. Just another thought for Dublin Bus/Bus Eireann and the NTA might give some consideration to.