The bridge was bypassed in the late 1990s when State Route 509 was routed around the edge of the tideflats.
State Route 44 is routed along a two-lane route for all of its existence.
After 1933, State Route 147 was routed across the Westham Bridge.
State Route 48 is routed along two-lane roadways for its entire existence.
When established in 1924, State Route 150 was routed along the southern Jefferson County alignment that it maintains to this day.
State Route 146 is routed along a two-lane road in its entirety.
State Route 21 and US Route 431 are routed along this street within the city.
From its inception, State Route 530 has been routed along the same alignment that it utilizes today.
In 1929, State Route 53 was routed through the town of St. Martin, a town it originally bypassed.
Later that year, State Route 17 was routed away from Zayante and other stops along the railroad right-of-way.
