Dublin Bus Volvo B9TL/Alexander Dennis Enviro400 EV56, one of 100 similar vehicles in the fleet, crosses the River Liffey on the Rosie Hackett bridge, built to accommodate southbound LUAS cross-city trams on the new extension of the Green Line from Broombridge to St Stephen’s Green, which would open in December 2017. There are bus lanes either side of the tramway, for buses heading to College Green via Hawkins Street and west along the quays. PAUL SAVAGE