
Total Traffic Volume & Performance in Brookings County, South Dakota
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day3,222 |
|---|
Trucks The percentage of the total traffic volume composed of heavy vehicles. | 9.1% |
|---|
Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 33.5 min |
|---|
Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 36.7 yrs |
|---|
Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $73,208 |
|---|
Our data shows 3,222 vehicles per day on the average road in Brookings County, South Dakota, and 835,611 vehicle-miles traveled per day (≈305 million per year) across its 365 miles of monitored roads. About 1 in 11 vehicles is a truck, in line with South Dakota (10.3%).
Busier roads than 89% of counties in South Dakota
The average road in Brookings carries 3,222 vehicles per day, essentially matching the state average of 3,156. Network-wide, Brookings accounts for about 3.4% of South Dakota's statewide total of vehicle-miles. By volume, Brookings's 3,222 vehicles per day outpaces 89% of counties in South Dakota.
The average trip takes 33.5 minutes, on par with the state level. Its average travel time of 33.5 minutes is shorter than 72% of counties in South Dakota.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Brookings County, South Dakota
| Traffic | vehicles per day4,369 |
|---|
| Trucks | 12.3% |
|---|
| Average travel time | 40.9 min |
|---|
| Drivers’ average age | 39.2 yrs |
|---|
| Drivers’ average income | $73,688 |
|---|
Travel in Brookings County, South Dakota splits roughly evenly, with about half of it (53% of vehicle-miles) on highways. The average highway carries 4,369 vehicles per day, 42% more than the average non-highway road in the same area, which carries 3,074 vehicles per day.
With 26% of the road miles (95 miles in 451 segments), highways punch above their length, carrying 439,587 vehicle-miles traveled per day (≈160 million per year).
83% of counties in South Dakota move less traffic on their highways.
Lower highway truck share than 75% of counties in South Dakota
The concentration of trucks on highways (12.3%) is 9% lower than the state average for similar road classifications. The highway traffic mix is typical for South Dakota: neither freight- nor commuter-dominated.
Brookings's highway truck share (12.3%) is lower than 75% of counties in South Dakota. By raw truck volume, Brookings carries more highway trucks than 67% of counties in South Dakota.

Non-highway Traffic in Brookings County, South Dakota
| Traffic | vehicles per day3,074 |
|---|
| Trucks | 5.6% |
|---|
| Average travel time | 32.5 min |
|---|
| Drivers’ average age | 36.1 yrs |
|---|
| Drivers’ average income | $72,955 |
|---|
Travel in Brookings County, South Dakota splits roughly evenly, with about half of it (47% of vehicle-miles) on local roads. On the average non-highway road, that comes to 3,074 vehicles per day.
Spread over 270 miles and 3,498 segments, 74% of the road network, local roads carry a lighter load per mile: 396,024 vehicle-miles traveled per day (≈145 million per year). About 1 in 18 vehicles on non-highway roads is a truck (5.6%).
The youngest drivers of any county in South Dakota
Non-highway roads carry a truck concentration that's 55% lower than the highway network.
58% of counties in South Dakota see lower average driver income among trip origins than Brookings. At 37 years, Brookings's median driver age is the lowest in South Dakota.