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Traffic heat map of St. Johns County, Florida: 704 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 95 and FL 9B

St. Johns County, Florida Traffic Counts

TrafficZoom tracks traffic on 704 road miles in St. Johns County, Florida, divided into 11,545 segments averaging 322 ft. Its drivers come from the highest-income neighborhoods of any county in Florida, averaging $111,435. Built from cross-verified mobile and road-sensor data, these counts help you size up a retail site, plan logistics routes or assess infrastructure needs.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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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
Trucks

The percentage of the total traffic volume composed of heavy vehicles.

9.6%
Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

29.6 min
Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

25.9%
Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

47.9 yrs
Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$111,435

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 icon

Highway Traffic in St. Johns County, Florida

Trafficvehicles per day18,540
Trucks15.2%
Average travel time41.7 min
Congestion ratio29.3%
Drivers’ average age46.9 yrs
Drivers’ average income$99,957

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 icon

Non-highway Traffic in St. Johns County, Florida

Trafficvehicles per day8,363
Trucks5.6%
Average travel time29.2 min
Congestion ratio25.8%
Drivers’ average age48.1 yrs
Drivers’ average income$114,986

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.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 77% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 20% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
February–April is the high season, with volumes +10% versus the annual average.
Lowest month:
June is the quietest month, with volumes -19% versus the annual average - an unusual summer low, when most places are at their busiest.

Data Finding: Hourly & Seasonal Patterns

In St. Johns County, Florida, the peak hour concentrates about 7% of the day's traffic, and there is a noticeable seasonal swing of +10% in high season.

St. Johns County vs. Florida Traffic Comparison

St. Johns County's biggest difference from the Florida average is its highway truck share, 34% above it.

MetricSt. Johns CountyFlorida averageDifference
Traffic8,6729,922-12.6%
Truck % (Total Traffic)9.6%8.6%+11.6%
Truck % (Highway)15.2%11.3%+33.9%
Avg. Travel Time29.6 min33.2 min-10.9%

How St. Johns County compares

St. Johns County is more congested than any nearby county

Against the 4 nearest areas, St. Johns County is 37.1% more congested; it has the third busiest roads of the five.

St. Johns County and the 4 nearest county-level areas by centroid distance, with the Florida average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
St. Johns County8,6729.6%8,457,32129.6 min25.9%
Clay County, Florida9,2247.2%4,134,91832.0 min23.1%
Putnam County, Florida4,06510.3%1,785,84035.7 min11.6%
Flagler County, Florida6,17211.7%3,073,88930.2 min17.8%
Duval County, Florida10,8598.5%26,904,24331.0 min23.0%
Florida average9,9228.6%N/A33.2 min23.8%

St. Johns County ranked within Florida

On average driver income, St. Johns County tops the Florida field outright.

St. Johns County ranked among 67 county-level areas in Florida (1 = highest); measures without data in every county rank a smaller field, down to 60.
MeasureSt. Johns CountyFlorida rank
Traffic volume (AADT)8,672#23 of 67
Highway vehicle-miles per day3,529,548#18 of 60
Truck share on highways15.2%#23 of 60
Highway trucks per day2,811#8 of 60
Average travel time29.6 min#66 of 67
Average driver income$111,435#1 of 67
Average driver age47.9 yrs#39 of 67

The two ends of this table sit far apart: #1 of 67 on average driver income, against #66 of 67 on average travel time.

Busiest roads in St. Johns County, Florida

Traffic concentrates on a few corridors: the three busiest roads average 57,015 vehicles a day, against 8,672 on the average road in St. Johns County.

I 95 is the busiest road, at 76,844 vehicles a day, 12,256 of them trucks (15.9%). That is 57% more than the next road, FL 9B (48,870). It also carries the most trucks.

Trips using I 95 are long: a median of 48.0 minutes against 29.6 county-wide, the mark of a through route.

Church Avenue draws drivers from lower-income areas: their neighborhoods average $69,811 in household income, 37% below the county's $111,435.

Trucks make up 15.9% of traffic on I 95, against 9.6% across all roads in the county.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 95Motorway · 76,844vehicles12,256trucks · 15.9%
Road class
Motorway
Congestion ratio
51.9%
Median trip time
48.0 min
Drivers’ median age
46.9 yrs
Drivers’ average income
$97,359

I 95 carries 8.9 times the county average on its busiest stretch, where the median trip lasts 48.0 minutes.

2FL 9BMotorway · 48,870vehicles2,549trucks · 5.2%
Road class
Motorway
Congestion ratio
60.4%
Median trip time
24.0 min
Drivers’ median age
44.8 yrs
Drivers’ average income
$135,288

Travel on FL 9B's busiest stretch runs 60% over free-flow time, against 26% across the county, so expect slower peak hours.

3Philips HighwayPrimary road · 45,330vehicles2,888trucks · 6.4%
Road class
Primary road
Congestion ratio
49.3%
Median trip time
28.7 min
Drivers’ median age
45.5 yrs
Drivers’ average income
$114,712

At 5.2 times the county average, Philips Highway draws drivers from neighborhoods averaging $114,712 in household income.

4Peyton ParkwaySecondary road · 36,761vehicles1,181trucks · 3.2%
Road class
Secondary road
Congestion ratio
38.7%
Median trip time
24.4 min
Drivers’ median age
45.4 yrs
Drivers’ average income
$133,836

At 4.2 times the county average, Peyton Parkway draws drivers from neighborhoods averaging $133,836 in household income.

5County Road 210Primary road · 35,077vehicles1,613trucks · 4.6%
Road class
Primary road
Congestion ratio
84.3%
Median trip time
26.1 min
Drivers’ median age
46.5 yrs
Drivers’ average income
$138,374

County Road 210 is one of the more congested roads here: trips take 84% longer than at free-flow speed, against 26% county-wide.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 95Motorway · #1 by traffic76,844vehicles12,256trucks · 15.9%
2Church AvenueTrunk road · 20,532vehicles2,920trucks · 14.2%
Road class
Trunk road
Median trip time
40.8 min
Drivers’ median age
50.6 yrs
Drivers’ average income
$69,811

Church Avenue carries through traffic: the median trip using it lasts 40.8 minutes, against 29.6 for the county.

3Philips HighwayPrimary road · #3 by traffic45,330vehicles2,888trucks · 6.4%
4FL 9BMotorway · #2 by traffic48,870vehicles2,549trucks · 5.2%
5US 1Primary road · 32,618vehicles2,463trucks · 7.5%
Road class
Primary road
Congestion ratio
43.1%
Median trip time
30.2 min
Drivers’ median age
50.4 yrs
Drivers’ average income
$87,664

The busiest stretch of US 1 carries 3.8 times the county average; trucks are 7.5% of it, below the county-wide 9.6%.

How to read these road counts
  • The first number is AADT, annual average daily traffic: the vehicles passing a point on an average day, both directions combined and trucks included. On a divided highway both carriageways are added together.
  • Traffic changes along a road, with more near interchanges and towns and less in open country. Every figure for a road describes its busiest stretch in the county, so the two rankings show the same numbers for the same road.
  • The second number is the trucks on that stretch, a part of its AADT. The bar splits the AADT into cars and light vehicles (blue) and trucks (amber).
  • See segment-level AADT for any road on TrafficZoom.

Data Sources & Methodology

The data presented on this page is derived from TrafficZoom's proprietary analytics platform, which aggregates and normalizes information from multiple sources, including:

Mobile device location data (anonymized and aggregated)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

St. JohnsDepartment of Transportation

Demographic Baseline for O-D Modeling

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
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Data current as of:
Q3 2026

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Counties near St. Johns County

The same traffic breakdown for the areas closest to St. Johns County, Florida.

Need segment-level traffic data?

Identify traffic patterns street by street and analyze the exact corridors that matter to your project.