Tower Bridge bridge's upper walkways. The pedestrian walkways are above the river at high tide. The main bridge deck carries two lanes of road traffic between two low-level pedestrian walkways across both suspension spans and the opening bascule section of the bridge, with the walkways separated from the roadway by fences. The roadway passes through each of the two towers, whereas the low-level walkways pass around the outside of the towers. One of the chimneys on the bridge, which are often mistaken for lamp posts, connects up to an old fireplace in a guardroom of the Tower of London. It is long-disused.
Tower Bridge (California) had crossed the bridge on November 7, 1935. The Tower Bridge was the first vertical lift bridge in the California Highway System after it was formally accepted by the state on January 11, 1936. The railroad tracks were removed in 1963. With the removal of the tracks, the roadway was restriped for four automobile lanes. However, due to the nearby railroad tracks that pass by the bridge, the grade crossing before the bridge on the Capitol Mall side is designed to act as a secondary barrier to prevent vehicular traffic from entering the bridge while raising or lowering. When the