Six Lanes, a Moving Barrier and No Shoulder

The Golden Gate Bridge is six lanes wide, and the number of those lanes running in each direction changes through the day to follow the commute. For most of the bridge's history, the only thing separating opposing traffic during those configurations was a line of plastic pylons. In 2015 a moveable median barrier was installed, and a specialized machine now repositions a continuous steel-and-concrete barrier along the deck to change the configuration.

That was a significant safety change. It also means the lane you used yesterday afternoon may not exist this morning.

Read the deck, not your memory

Overhead lane-control signals show which lanes are open in your direction, and the physical barrier shows you where the boundary is. Both are authoritative and both change. The practical rule is to look up as you approach rather than driving the bridge from habit, and to settle into your lane before the deck rather than after, because there is very little room to reconsider once you are on it.

The lanes are narrow and there is no shoulder

This is the single most important physical fact about the bridge. It was designed in the 1930s, the lanes are narrow by modern standards, and there is no breakdown lane in either direction. If your car stops on the Golden Gate, you are stopped in a live traffic lane with a barrier on one side and traffic on the other.

Which makes the boring advice matter more than usual. Do not start across on a warning light. Do not cross with a tire you already know is soft. Keep the fuel above the point where a two-hour backup becomes a problem. Bridge patrol vehicles work the span and will reach you, but the minutes before they do are genuinely exposed, and the right move is almost always to stay belted inside the vehicle rather than to get out and stand next to it.

Fog, and the wind at the towers

Summer afternoons bring the marine layer through the Gate in a way that is spectacular from a distance and disorienting from inside it. Visibility can go from clear to a few car lengths within the bridge's own length. Headlights on, low beams, and more following distance than the traffic around you appears to be using.

Wind through the Gate is the other one, and it behaves like the crosswinds at any strait: the towers and the terrain at each end create sheltered pockets, and the gust arrives when you leave one. High-sided vehicles feel it most.

Tolls run southbound only

The Golden Gate is tolled in the southbound direction only, and it is operated by its own district rather than as one of the state-owned bridges, so its toll arrangements are administered separately. Tolling is electronic, using a FasTrak tag, a license plate account or a one-time payment rather than cash in a lane.

The consequences of not paying are the ones that apply to tolls generally: Vehicle Code section 40250 handles toll evasion as a civil penalty with the registered owner and driver jointly and severally liable, and Vehicle Code section 4770 requires the DMV to refuse a registration renewal where a toll evasion notice has been mailed and remains unpaid. Keep the payment method on your account current and none of that ever comes up.

Marin drivers, one more thing

If you cross the Gate daily, that is real mileage, and annual miles driven is the second of California's three mandatory rating factors under Insurance Code section 1861.02(a). Worth making sure your carrier's figure matches your actual commute rather than the one you gave them years ago.

Two minutes to find out what that looks like now.