SIOUX FALLS, S.D. (KELO) — This story has been updated to include data received Thursday afternoon reflecting updated and exact speeds.

So far in 2021, the South Dakota Highway Patrol has issued 477 citations to drivers caught doing 100 mph or more.

November 4 is the 308th day of 2021, meaning that so far this year the South Dakota Highway Patrol has averaged around 1.5 +100 mph speeding stops each day.

After receiving the data relating to exact speeds listed on citations, KELOLAND News calculates that drivers caught going over 100 mph have combined to travel a total of 48,201mph on South Dakota highways so far this year. This averages out to about 101mph/citation.

The highest speed of an individual cited by Highway Patrol so far this year in South Dakota is 140mph, which was recorded in October in Clay County.

Unsurprisingly, the majority of counties in which the Highway Patrol recorded the highest numbers of +100 mph stops all share one thing in common; the presence of I-29 and/or I-90.

The county with the most stops over 100 mph is Union County, which has totaled a whopping 63 so far this year. On the other end of the spectrum, there are 25 counties that have recorded no +100 mph stops.

Below are the totals for each county so far in 2021, listed from highest to lowest.

Union – 63
Davison – 44
Pennington – 36
Minnehaha – 32
Meade – 24
Jackson – 23
Lyman – 23
Codington – 21
Brule – 21
Lincoln – 20
Lawrence – 19
Moody – 19
Brookings – 18
Jones – 18
Hanson – 16
Brown – 8
Clay – 7
Aurora – 6
Butte – 6
Custer – 5
Sanborn – 5
Hamlin – 4

McCook – 4
Yankton – 4
Beadle – 3
Clark – 3
Roberts – 3
Deuel – 2
Edmunds – 2
Harding – 2
Spink – 2
Tripp – 2
Walworth – 2
Bennett – 1
Charles Mix – 1
Day – 1
Grant – 1
Haakon – 1
Hand – 1
Marshall – 1
Potter – 1
Bon Homme – 0
Buffalo – 0
Campbell – 0

Corson – 0
Dewey – 0
Douglas – 0
Fall River – 0
Faulk – 0
Gregory – 0
Hughes – 0
Hutchinson – 0
Hyde – 0
Jerauld – 0
Kingsbury – 0
Lake – 0
McPherson – 0
Mellette – 0
Miner – 0
Oglala Lakota – 0
Perkins – 0
Stanley – 0
Sully – 0
Todd – 0
Turner – 0
Ziebach – 0

In terms of full months in 2021 (November and December not counted), August carried the most +100 mph citations (77), while February had the least (21).

Below are a few different visualizations showing the number of +100 mph citations per month by county.