
Total Traffic Volume & Performance in St. Johns County, Florida
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day8,672 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 9.6% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 29.6 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. | 25.9% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 47.9 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $111,435 |
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A typical monitored road in St. Johns County, Florida sees 8,672 vehicles per day, while its 704 miles of monitored roads together handle 8,457,321 vehicle-miles traveled per day (≈3.1 billion per year). Trucks are 9.6% of traffic, close to the 8.6% across Florida.
Shorter trips than 98% of counties in Florida
St. Johns's average daily traffic volume is 13% lower than the state average - 8,672 vehicles per day against 9,922 - a critical factor for logistics and site planning. In total volume terms, its road network carries about 1.6% of Florida's statewide total of vehicle-miles. St. Johns carries more traffic than 67% of counties in Florida.
At 29.6 minutes, the average travel time is 11% lower than the state level. 98% of counties in Florida have a longer average travel time than St. Johns's 29.6 minutes.
The congestion ratio of 25.9% runs slightly higher than the state level (9% higher).
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in St. Johns County, Florida
| Traffic | vehicles per day18,540 |
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| Trucks | 15.2% |
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| Average travel time | 41.7 min |
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| Congestion ratio | 29.3% |
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| Drivers’ average age | 46.9 yrs |
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| Drivers’ average income | $99,957 |
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Highways carry a significant share of travel in St. Johns County, Florida: 42% of all vehicle-miles. The average highway carries 18,540 vehicles per day, 122% more than the average non-highway road in the same area, which carries 8,363 vehicles per day.
With 17% of the road miles (119 miles in 351 segments), highways punch above their length, carrying 3,529,548 vehicle-miles traveled per day (≈1.3 billion per year).
That is more highway travel volume than 71% of counties in Florida.
More highway trucks than 88% of counties in Florida
Highway truck concentration here runs 34% higher than the state average, at 15.2%. Highways here lean toward freight, so highway access is a real asset for logistics operators.
St. Johns's highway truck share (15.2%) is higher than 63% of counties in Florida. 88% of counties in Florida see fewer highway trucks per day than St. Johns's roughly 2,811.

Non-highway Traffic in St. Johns County, Florida
| Traffic | vehicles per day8,363 |
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| Trucks | 5.6% |
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| Average travel time | 29.2 min |
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| Congestion ratio | 25.8% |
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| Drivers’ average age | 48.1 yrs |
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| Drivers’ average income | $114,986 |
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A little more than half of the driving in St. Johns County, Florida happens on local roads: 58% of all vehicle-miles. The average non-highway road carries 8,363 vehicles per day.
Spread over 585 miles and 11,194 segments, 83% of the road network, local roads carry a lighter load per mile: 4,927,773 vehicle-miles traveled per day (≈1.8 billion per year). About 1 in 18 vehicles on non-highway roads is a truck (5.6%).
The highest driver income of any county in Florida
The concentration of trucks on non-highway roads is 63% lower than on highways.
Non-highway congestion (25.8%) runs slightly higher than the state level (14% higher).
St. Johns also has the highest average driver income in Florida among trip origins - $111,435. St. Johns's median driver age is lower than 58% of counties in Florida.