With the opening of the first tunnel however, Ashby became the more direct approach to the Tunnel Road and was improved over the years to channel through traffic, especially during the 1930s when both the new Broadway (later renamed Caldecott) Tunnel and the Bay Bridge were constructed.
The first tunnel's opening made Ashby a more convenient route to Tunnel Road, which was subsequently improved throughout the years to handle increased traffic, particularly during the 1930s when the new Broadway (later known as Caldecott) Tunnel and the Bay Bridge were built.