Writing fanfic as a non-US citizen like

In case anyone actually wants to know the answer: it’s the plot of Cars. The difference is literally the plot of Cars.

Highways are usually two-to-four (at the widest) lane roads that meander the US landscape. Think Route 66, dinosaur statues, mom-and-pop diners, southern gothic. There are state-level and national-level highways. Some run for a 100 miles, some, like US HWY-17, run most of the East Coast:

That red line is US HWY 17. If you follow it, you will go through tiny towns. You may hit stoplights. I kid you not, you will see spinning cows on poles. Businesses exist along highways that you are encouraged to pull over and visit. They were designed to let you see America.

Yeah.

Now, interstates were made in the 50s and were made to get people from Point A to Point B. These suckers range from four lanes to eight lanes around big cities. They cut through everything. If you want to get to a business, you have to take an exit ramp and detour. They are great for getting places fast. You can still have weird experiences on them, but usually at night, when your eyes start playing tricks on you. Or there are deer.

I-95 is a massive corridor that runs from the Florida Keys to the Canadian Border. You can see the difference just looking at the maps.

As far as writing goes:

If you want quirky character development inside the car, you’re looking for an interstate. The majority of Americans take interstates to go on road trips.

If you want mysterious and/or supernatural hijinks, you’re looking for a highway. They are weird, weird places, and they’re surprisingly easy to wind up on if you leave the interstate.

(Even in America, no one’s really sure what a freeway is. Just ignore it.)

Freeways exist in big cities where cars are more prominent than public transport, such as LA or Atlanta. You’ve year of liminal spaces? Freeways during rush hour are a physical manifestation of hell.

Awesome! Now what the hell is a turnpike?

If you find out, let me know. Maybe ask someone from New Jersey.

A turnpike is a highway with a toll. Turnpikes are special highways where you drive really fast and it’s usually linking big cities with each other and you keep going until you hit a toll booth.

They’re called “turnpikes” because in the olden days, there were pikes or barriers up and you had to pay the toll for them to be raised or turned to let you in.

Also, just for the record, Hawaii does have interstates.

For everyone who didn’t want to know, expressways are a form of highway that connect both suburban areas and major interstates to a city They often have both an alphanumerical name and a colloquial name In Philly we have the Schuylkill Expressway (I-76)

Would like to add that highways and mainly interstates were made specifically so THE MILITARY could get from Point A to Point B. This combined with a post-WWII boost in the economy and car industry gave Americans the ability to tour the country on their own for the first time ever. A whole chunk of American culture was created by just expanding the road system.

Think about road systems and other systems of travel when worldbuilding!

All this being said, most East Coast US people will refer to all of these things interchangeably as “highways”/”the highway.”

Another note for non-USians trying to write a road trip story – if your characters would definitely be taking the interstate, but you want them on a highway in order for the supernatural shenanigans to start (or whatever), the solution is very simple: they hit a traffic jam. Could be due to construction, could be due to an accident, but traffic slows to a crawl and they say “there’s gotta be a way around this” and take the next exit. Then it turns out their cell phone has no coverage in that spot so they can’t just pull up a map, and VOILA. Into the Twilight Zone! One of the things about an interstate is that USUALLY, there’s an exit and an entrance right by each other, so you can exit, find a gas station or a place to grab lunch near the exit, then get right back on, but this is not always the case. Sometimes there’s an exit, but nowhere nearby to get back on.

I just want to add that there's a slightly different vibe if you're in the midwest. Because cities on the coasts are closer together, the interstate is just a super efficient point A to point B, city to city, no interruptions.

In the midwest, and I expect the southwest, to the interstate can get some real wonky vibes because YOU ARE ALONE. You are on one black strip of neverending road across hours and hours and hours of alone. You can drive very fast for a very long time and not see signs of another human being. Sometimes the alone-ness is added to by the sheer flatness of the land around you. You can see for forever and there's nobody here. You sometimes see dead gas stations or billboards with only scraps of paper left on them.

You are in tornado ally and there is NOWHERE to hide if a blizzard or thunderstorm or twister comes for you. If it's winter the snow is BLINDING.

It's beautiful. But it's horror is less small-town-gothic and more existential threat.