Who built that?
What's the biggest bridge that replaced a ferry?
Richmond-San Rafael Bridge's humps. A true story near Corte Madera, CA, told for kids 5–9.
The Richmond–San Rafael Bridge story, read aloud
Look out at San Rafael Bay! That long, long bridge is the Richmond-San Rafael Bridge, and it carries cars from San Rafael all the way across the water to Richmond. But why does it go up and down, like a sea serpent swimming across the bay? See if you can spot the two big humps. Some people call it the roller coaster bridge!
Here's why it's bumpy. Big ships need room to sail underneath, so in two places the bridge lifts up high, like a cat arching its back. The builders wanted to save money, so they made those two high parts exactly the same, like twins. So the road has to climb up, dip down in the middle, and climb up again the very same way. And it's huge, about five and a half miles long!
When it opened, only one bridge in the whole world was longer. Before it, people crossed here on a ferry boat. Now cars just roll over the humps!
Quiz the back seat
Why does the bridge have two high humps?
Show the answer
So big ships can sail under. So big ships can sail under! And the builders made both humps exactly the same to save money, like twins.
Richmond–San Rafael Bridge facts for kids
- The Richmond-San Rafael Bridge opened in 1956 and replaced a ferry.
- It is about 5.5 miles long and was the world's second-longest bridge when it opened.
- Its two cantilever spans were built identically to save money, giving the road its up-and-down roller coaster shape.
Questions kids ask about Richmond–San Rafael Bridge
Why is the Richmond-San Rafael Bridge shaped like a roller coaster?
It has two high parts so ships can pass under, and they were built exactly the same to save money, so the road goes up, down, and up again.
How long is the Richmond-San Rafael Bridge?
It is about five and a half miles long, and when it opened only one bridge in the world was longer.
How did people cross before the bridge was built?
They rode a ferry boat across the bay.
For grown-ups
Written with AI from public sources, then checked claim by claim against the sources below before it was published; stories that don't pass stay off the app and this site. Narration is pre-recorded, and nothing you do on this page is tied to your kids.
Sources
More stories in Corte Madera
Long, long ago The Place Where Wood Is Cut
We're driving through Corte Madera. That's a Spanish name, and it means "the place where wood is cut".
Mountains, trees and weather The Mountain with Strange Dirt
Look out the window at Ring Mountain, the grassy hill on the Tiburon Peninsula. Its two tops are made of a special rock called serpentine.Build one with bricks
How things work: roads, bridges, oceans →All stories →
Between stories: 25 road trip games for kids · Road trip bingo cards · Road trip trivia · Christmas light scavenger hunt · Christmas trivia
Town and county names: GeoNames (CC BY 4.0).