
Total Traffic Volume & Performance in St. Lucie County, Florida
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day8,693 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 11.5% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 32.8 min |
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Congestion ratio The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 22.3% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 51.5 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $77,199 |
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The average monitored road in St. Lucie County, Florida carries 8,693 vehicles per day. Across its 745 miles of monitored roads, that adds up to 7,985,200 vehicle-miles traveled per day (≈2.9 billion per year). At 11.5%, the truck share runs above the 8.6% across Florida: about 1 in 9 vehicles.
Busier roads than 68% of counties in Florida
At 8,693 vehicles per day, the average road in St. Lucie carries somewhat less traffic than the state average of 9,922 (12% less) - a critical factor for logistics and site planning. Across the whole network, that travel is about 1.5% of Florida's statewide total. 68% of counties in Florida see less traffic than St. Lucie's 8,693 vehicles per day.
At 32.8 minutes, the average travel time matches the state level closely. 59% of counties in Florida have a longer average travel time than St. Lucie's 32.8 minutes.
The congestion ratio of 22.3% runs slightly lower than the state level (6% lower).
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in St. Lucie County, Florida
| Traffic | vehicles per day15,649 |
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| Trucks | 18.8% |
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| Average travel time | 47.9 min |
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| Congestion ratio | 25.0% |
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| Drivers’ average age | 50.8 yrs |
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| Drivers’ average income | $84,206 |
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A significant share of driving in St. Lucie County, Florida, 43% of vehicle-miles, happens on highways. The average highway carries 15,649 vehicles per day, 85% more than the average non-highway road in the same area, which carries 8,451 vehicles per day.
With 22% of the road miles (167 miles in 407 segments), highways punch above their length, carrying 3,409,229 vehicle-miles traveled per day (≈1.2 billion per year).
That is more highway travel volume than 69% of counties in Florida.
Freight-heavy highways
At 18.8%, highway truck share is 66% higher than the state average. Highways here lean toward freight, so highway access is a real asset for logistics operators.
By truck concentration, highways here outrank 73% of counties in Florida. St. Lucie's highway truck count is higher than 83% of counties in Florida, at roughly 2,945 trucks per day.

Non-highway Traffic in St. Lucie County, Florida
| Traffic | vehicles per day8,451 |
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| Trucks | 6.1% |
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| Average travel time | 32.3 min |
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| Congestion ratio | 22.2% |
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| Drivers’ average age | 51.6 yrs |
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| Drivers’ average income | $75,579 |
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A little more than half of the driving in St. Lucie County, Florida happens on local roads: 57% of all vehicle-miles. On the average non-highway road, that comes to 8,451 vehicles per day.
Local roads make up 78% of the monitored road miles (578 miles in 11,714 segments) but carry less than their share of travel: 4,575,971 vehicle-miles traveled per day (≈1.7 billion per year). The truck share on non-highway roads is 6.1%.
Older drivers than 76% of counties in Florida
The concentration of trucks on non-highway roads is 68% lower than on highways.
The non-highway congestion ratio of 22.2% is in line with the state level.
Trip origins here have higher average income than 61% of counties in Florida. St. Lucie's median driver age is higher than 76% of counties in Florida.