Drawbridges, Grate Decks and Two Free Ferries

Drive the Delta for an afternoon and you will run into infrastructure that exists almost nowhere else in California: bridges that lift, swing or slide out of the way for river traffic, and a pair of state-run ferries that carry cars across sloughs for free. Neither is a novelty. They are the road, and knowing how they work saves you a lot of confusion.

The bridges move, and boats win

Movable bridges cross the Delta's channels at Rio Vista, Isleton, Walnut Grove, Paintersville and elsewhere. When a vessel needs the channel, warning lights come on, gates drop, and the span opens. Road traffic waits. That priority is not negotiable and it is not a malfunction, so settle in.

The genuinely important part: do not try to beat the gates. A descending gate arm on a movable bridge is not a parking-garage barrier that pops back up. Behind it, the deck you are driving toward is about to stop being there. Drivers who run gates on lift bridges are the reason those gates exist.

The grate decks are slippery, and that is normal

Several Delta bridges have open steel grate decks to save weight. Two things happen on them. Your tires track the grating and the steering goes vague and wandery, which feels alarming the first time and is completely ordinary. And when wet, a steel grate offers considerably less grip than asphalt.

The response is the same to both: slow before you get on the deck, hold the wheel with a relaxed grip, and do not brake, accelerate or change lanes while you are on it. Let the car wander a little. It is not going anywhere.

The Real McCoy and the J-Mack

Two cable ferries still operate in the Delta as part of the state highway system, which means they are free to use. The Real McCoy runs to Ryer Island near Rio Vista, and the J-Mack crosses Steamboat Slough at Howard Landing. They carry a handful of vehicles at a time, run on demand rather than to a timetable during operating hours, and take a few minutes to cross.

If you have never driven onto one:

1. Wait behind the line until a crew member waves you on. They are loading for balance, not first-come order.
2. Drive on slowly and straight. The apron plate at the edge is a step, and taking it at speed is how bumpers and exhausts get damaged.
3. Stop where directed, put the transmission in park, and set the parking brake. Both, not one.
4. Stay off the throttle until you are directed off, and take the apron slowly again on the way out.

Low-slung cars should be genuinely careful at the apron. That transition is where the scrapes happen.

Is your car covered on a ferry?

Generally, a personal auto policy's physical-damage coverages continue to apply while the vehicle is being transported by ferry, and that is how these crossings have long been treated. But "generally" is doing real work in that sentence. Marine transit, watercraft and transportation exclusions vary from carrier to carrier and from form to form, and this is exactly the kind of edge case where two policies can read differently.

If you use the ferries regularly, ask your own carrier the question directly and get the answer in writing. It is a five-minute call and it beats discovering the answer during a claim.

Planning around all of it

Bridge openings and ferry loads make Delta travel times genuinely unpredictable, which is worth knowing if you are driving to something with a start time. And the ferries do not run around the clock. If you are looping Ryer Island in the evening, check the operating hours before you commit, because the detour back around is long and the levee roads at night are not where you want to be improvising.

Questions about what your policy covers where? We will go through it line by line.