9 Unwritten Rules of Driving in Louisiana That Newcomers Learn the Hard Way

Think Louisiana’s open container law keeps a drink out of your cup holder?

Not exactly.

Order a frozen daiquiri from a drive-thru window, and it’s perfectly legal as long as the straw stays taped shut.

These are the unwritten rules of driving in Louisiana, the laws every local picks up growing up but nobody hands a newcomer in writing.

Contraflow Is the Backup Plan

Hurricane season turns Louisiana’s interstates into a one-way system, at least on paper.

The state can flip every lane of I-10, I-55, and I-59 so all of them point away from the coast, and if you’re leaving, that’s double the lanes to work with.

The plan is called contraflow.

On paper, it sounds simple.

In practice, it rarely happens.

Louisiana hasn’t triggered contraflow since Hurricane Gustav in 2008 because the order needs a slow-moving storm and roughly 72 hours of lead time.

Faster-forming storms blow past that window before the lanes ever flip.

Louisiana drivers still know the plan by heart every June because the year contraflow doesn’t run is exactly the year you need to already know your own way out.

Buses Beat the Turn Lane

A school bus stops on a four-lane road with a center turn lane down the middle, and many drivers keep rolling because they figure that lane counts as a median.

It doesn’t.

Louisiana law only excuses drivers on the opposite side of a divided highway with a real physical barrier or median, and a center turn lane doesn’t qualify, no matter how wide it looks.

You still have to stop, same as the driver right behind the bus.

A first offense runs $100 to $500 and up to six months in jail; a second offense within five years jumps to $1,000 to $5,000, a year in jail, and a possible license suspension.

No warning shot.

Newcomers usually find out only when the lights show up behind them.

Never Pass a Stopped Car

Traffic stops at a New Orleans crosswalk with no light, and a driver two cars back swings around the line to keep moving.

That’s illegal, and it’s also how pedestrians get hit.

Once a Louisiana driver stops at a crosswalk to let someone cross, any car approaching from behind is barred from overtaking that stopped car.

Swing around it, and you might not see the person crossing until it’s too late.

Zero visibility, all the risk.

Newcomers used to open interstates don’t expect a stopped car mid-block, so they pass exactly the way this law forbids.

Funerals Get the Right of Way

A funeral procession glides through a red light on Louisiana Highway 1, and every car behind follows it straight through, headlights on, hazards blinking.

Louisiana law lets it happen on purpose.

Once the lead vehicle in an escorted procession lawfully enters an intersection, the rest of the line may follow through, whatever the signal says.

You have to yield too, same as everyone else.

Cut into the line, break it apart, or fail to yield, and the fine runs $100 per offense.

No exceptions.

Tap the horn or try to pass a slow procession on I-49 outside Lafayette, and you'll get nothing but confused stares. Everybody else already knows to wait it out.

Taped-Straw Loophole

Drive-thru daiquiri shops line south Louisiana's highways, and yes, you can get a frozen drink without leaving your car.

That sounds like an open-container violation anywhere else.

Not under Louisiana law.

A frozen daiquiri counts as sealed as long as the lid stays on and the straw hole stays covered with a piece of tape.

Peel the tape off before the car is parked, and that cup becomes exactly what it looks like.

An open container.

State troopers watch for missing tape at stops along the interstate, so smart passengers keep their daiquiris sealed until somebody parks.

The exception covers the cup, not the person, so peeling the tape while the car's still moving turns a legal daiquiri into an open container.

Small Towns Live on Your Ticket

Slow down on the back highways connecting central Louisiana to the Texas line because a handful of tiny towns depend on your speeding ticket to make payroll.

Fenton, a village of 226 people near Lake Charles, pulled in $1.3 million in fines in a single year, almost all of it from traffic stops.

Ninety percent of the budget.

A village smaller than most Louisiana high schools collected close to what Shreveport, one of the state's largest cities, brings in from fines and forfeitures.

Louisiana lawmakers have pushed to rein in these mayor's-court speed traps for years.

Local officials still lobby hard to keep them running.

Coast through a 35 mph zone on a two-lane road between two interstates, and that sudden drop in the speed limit is often the whole town's business model.

Different Rules Apply on the Causeway

The Lake Pontchartrain Causeway runs nearly 24 miles across open water between the north shore and Metairie, and for long stretches, land disappears in both directions.

Cross it southbound, and the toll runs $6 cash, or $3.40 with a transponder.

Cross it northbound, and it's free.

No shortcuts, either way.

Causeway Police run rolling convoys when fog rolls in, slowing every car to a set pace with no lane changes allowed until visibility clears.

Stop on the bridge outside an actual emergency, and you become the emergency, since there's nowhere to go around you.

Newcomers who ease off the gas to admire the view learn that lesson from the driver riding their bumper.

Swamp Fog Closes the Interstate

I-10 crosses the Atchafalaya Basin on an 18-mile bridge with only two exits, at Whiskey Bay and Butte La Rose, and no gas station at either one, so drivers fill up before they commit to the crossing.

A different hazard shows up when smoke meets fog over the marsh.

In October 2023, smoke from a marsh fire mixed with fog over I-55 near Manchac and dropped visibility to almost nothing within minutes. The pileup that followed involved 168 vehicles, killed 8 people, and injured 63 more.

Superfog, meteorologists call it.

Drivers who grew up near the wetlands know to slow down when smoke and fog mix over a swamp crossing.

If you didn't grow up near the wetlands, the brake lights ahead of you are often your only warning.

Mardi Gras Redraws the Map

New Orleans plans its whole driving map around Mardi Gras well before a single parade rolls, though the barricades go up close to showtime.

Crews barricade stretches of St. Charles Avenue and the rest of Uptown's route about two hours before each parade starts, and legal parking near it disappears completely.

Leave your car there anyway, and the city tows it.

Every time.

That's a $162 towing fee, plus storage, plus every unpaid ticket already on file.

Regulars build their whole February around the parade schedule, checking it like a hurricane track because it decides which streets stay open that week and which streets don't.

A local reroutes around six closed blocks without thinking twice.