The bridge has a large central span of 97.6 m, with three smaller spans on its eastern approach and six on its west. It is 296 m long and built entirely of reinforced concrete, with the girders in its approaches being claimed as the longest continuous segments in the world at the time. Electric street lighting - which was unusual in the early 1900s - lit the raised pavements and provision was made for two-way road traffic. Little maintenance was required in its first decades, although two programmes of repair were carried out in the 1930s and 1950s. The bridge is still used as a major thoroughfare, and has seen further small modifications in the 1990s.
Grafton Bridge is of national and international significance for its use of advanced concrete technology, and is an important symbol of national and civic pride. It has considerable value as a major construction project, instigated and completed by local government authorities. The structure provides valuable information about the development of road transport, and was the first major road bridge in Auckland. It has played a significant role in the lives of ordinary Aucklanders as a link to Auckland Hospital and the recreation grounds in the Auckland Domain. Constructed with its foundations in an early colonial cemetery, it demonstrates early twentieth-century civic attitudes to the past and to the dead. It has considerable value as a prominent landmark, and is part of a larger historical landscape that includes Symonds Street cemetery.





