Dublin and Belfast have comprehensive local bus networks, as do some other larger towns.
- The Dublin Area Rapid Transport (DART) rail line runs roughly the length of Dublin's coastline, while the Luas tram system has two popular lines.
- Taxis tend to be expensive: flagfall is daytime/nighttime €3.60/4 plus €1.10/1.40 per km after the first 500m.
- Uber is in Dublin and is expected to spread elsewhere.
Border crossings between Northern Ireland the Republic are unnoticeable; there are no formalities of any kind.
Travel costs throughout this book are for single (one-way) adult fares, unless otherwise stated.