It's a disturbing trend on America's highways and roads - more and more people are dying behind the wheel.

According to Stacker, the most recent numbers from the National Highway Traffic Safety Administration's (NHTSA) Fatality Analysis Reporting System show that traffic fatalities rose more than seven percent in 2020 to nearly 39,000 across the country.

That was the highest number of deaths since 2007.

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In the Tri-State Area, two counties are among the 100 deadliest in America, based on fatalities per 100,000 people.

Adair County, Iowa (Google Maps)

The Deadliest county roadways in Iowa :

With more than 80 deaths per 100,000 people (#40 nationally, 6 deaths), Iowa's Adair County (West of Des Moines along I-80) is the 40th most deadly county in the U.S.

Turner County, South Dakota (Google Maps)

The Deadliest county roadways in South Dakota :

The other area county in the top 100 is South Dakota's Turner County (Southwest of Sioux Falls) with nearly 70 deaths per 100,000 people (#64 nationally, 6 deaths). That's 64th overall.

Cass County, Minnesota (Google Maps)

The Deadliest county roadways in Minnesota:

Cass County, Minnesota (in the North Central part of the state) 23.4 fatalities per 100,000 people, (#635 nationally, 7 deaths).

IOWA (Number of motor vehicle crash fatalities)

Adair County (County Seat: Greenfield) - 80.7 per 100K people
Madison County (County Seat: Winterset) - 36.6 per 100K people
Iowa County (County Seat: Marengo) - 36.2 per 100K people
Hardin County (County Seat: Eldora) - 35.3 per 100K people
Plymouth County (County Seat: Le Mars) - 35.2 per 100K people

MINNESOTA (Number of motor vehicle crash fatalities per 100,000 people)

Cass County (County Seat: Walker) - 23.4 per 100K people
Wabasha County (County Seat: Lake City) - 23.3 per 100K people
Becker County (County Seat: Detroit Lakes) - 22.9 per 100K people
Isanti County (County Seat: Cambridge) - 19.7 per 100K people
Itasca County (County Seat: Grand Rapids) - 17.8 per 100K people

SOUTH DAKOTA (Number of motor vehicle crash fatalities)

Turner County (County Seat: Parker) - 69.6 per 100K people
Lawrence County (County Seat: Deadwood) - 46.7 per 100K people
Codington County (County Seat: Watertown) - 17.7 per 100K people
Minnehaha County (County Seat: Sioux Falls) - 11.8 per 100K people
Pennington County (County Seat: Rapid City) - 10.1 per 100K people

LOOK: See how much gasoline cost the year you started driving

To find out more about how has the price of gas changed throughout the years, Stacker ran the numbers on the cost of a gallon of gasoline for each of the last 84 years. Using data from the Bureau of Labor Statistics (released in April 2020), we analyzed the average price for a gallon of unleaded regular gasoline from 1976 to 2020 along with the Consumer Price Index (CPI) for unleaded regular gasoline from 1937 to 1976, including the absolute and inflation-adjusted prices for each year.

Read on to explore the cost of gas over time and rediscover just how much a gallon was when you first started driving.

Gallery Credit: Sophia Crisafulli

LOOK: Here's where people in every state are moving to most

Stacker analyzed the Census Bureau's 2019 American Community Survey data to determine the three most popular destinations for people moving out of each state.

Gallery Credit: Amanda Silvestri

9 Ways To Ruin Your South Dakota Driving Record

Did you know that South Dakota uses a points system with your driver's license? Meaning that if you are convicted of a moving violation, get a ticket, you get a certain number of points.

If those points add up to 15 in one year, or 22 points in two years, you can get your license suspended. Then after the suspension, you'll have to pay application fees and the reinstatement fee.

So, what are the violation that can earn you the most points? Let's find out.

SOURCE: South Dakota Department of Public Safety