It is hidden on the downstream (eastern) side of the bridge and there are no places to cross the very busy road on the bridge itself. Make sure that you get to the right side before walking along the bridge.
There's also no parking on the bridge and the traffic is busy day and night - please don't try to park and grab!
The bridge was officially opened in October 1928 and carried the main road north through the city, replacing the Swing Bridge below as the major crossing point. It has the advantage of crossing the gorge at the top instead of forcing traffic down steep banks on both sides of the river (the other bridge at this height, the High Level Bridge, which also carries a railway had tolls at this time).
It was designed by Mott, Hay and Anderson who also designed the Sydney Harbour Bridge. The bridge's towers are built from Cornish granite and were designed as five storey warehouses; the inner floors were never completed so the storage areas are barely used. Lifts were built into the towers to provide access to the Quayside but they are also no longer in use.
Dorman Long of Middlesbrough were the main contractors on the bridge and also made the steel.
The bridge is a total of 389m long with 162m between the towers. The road deck is 26 m above the river level at high tide and the arch is another 33m high.