This is a list of roads designated A4. A4 is the name of several roads: * A004 road (Argentina), a road connecting Buenos Aires-La Plata highway with the Juan María Gutiérrez circle * A4 motorway (Austria), a road connecting Vienna and Nickelsdorf on the Hungarian border * A4 highway (Australia) may refer to : * A4/M4 (Sydney), a road linking the Blue Mountains and Sydney * A4 highway (Queensland), a road connecting Rockhampton with the Landsborough Highway at Barcaldine * A4 highway (Tasmania), a road connecting the Midland Highway with the Tasman Highway * A4 motorway (Belgium), a road connecting Brussel and the A6 in Luxembourg * A4 motorway (Bulgaria), a road connecting A1 at Chirpan and the border crossing to Turkey, at the village of Kapitan Andreevo * A4 road (China) may re