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Traffic heat map of St. Lucie County, Florida: 745 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 95

St. Lucie County, Florida Traffic Counts

Traffic analytics for St. Lucie County, Florida, calculated from real-world mobile and sensor networks on 12,121 road segments (745 road miles, about 325 ft each). Its busiest road, I 95, carries 66,240 vehicles a day, 7.6 times the average road. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
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. Lucie County, Florida

Traffic

The average number of vehicles that travel each day over any road in the road network.

vehicles per day8,693
Trucks

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

11.5%
Average travel time

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

32.8 min
Congestion ratio

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

22.3%
Drivers’ average age

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

51.5 yrs
Drivers’ average income

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

$77,199

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 icon

Highway Traffic in St. Lucie County, Florida

Trafficvehicles per day15,649
Trucks18.8%
Average travel time47.9 min
Congestion ratio25.0%
Drivers’ average age50.8 yrs
Drivers’ average income$84,206

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 icon

Non-highway Traffic in St. Lucie County, Florida

Trafficvehicles per day8,451
Trucks6.1%
Average travel time32.3 min
Congestion ratio22.2%
Drivers’ average age51.6 yrs
Drivers’ average income$75,579

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.

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 67% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 17% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
February–April is the high season, with volumes +11% versus the annual average.
Lowest month:
July is the quietest month, with volumes -8% versus the annual average - an unusual summer low, when most places are at their busiest.

Data Finding: Hourly & Seasonal Patterns

In St. Lucie County, Florida, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +11% in high season.

St. Lucie County vs. Florida Traffic Comparison

St. Lucie County's biggest difference from the Florida average is its highway truck share, 66% above it. Its truck share is also 34% above.

MetricSt. Lucie CountyFlorida averageDifference
Traffic8,6939,922-12.4%
Truck % (Total Traffic)11.5%8.6%+34.0%
Truck % (Highway)18.8%11.3%+66.3%
Avg. Travel Time32.8 min33.2 min-1.2%

How St. Lucie County compares

St. Lucie County moves more traffic than any nearby county

Against the 4 nearest areas, St. Lucie County moves 2.3 times the total daily travel; it has the second busiest roads of the five. Bigger and busier at once: more road than the areas around it and heavier traffic on it, which makes it the centre of gravity for travel in this part of the map.

St. Lucie 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. Lucie County8,69311.5%7,985,20032.8 min22.3%
Indian River County, Florida7,51812.3%3,936,42031.0 min18.7%
Okeechobee County, Florida5,95315.1%1,304,93229.6 min18.6%
Martin County, Florida10,06210.2%6,524,80331.7 min24.3%
Highlands County, Florida5,05210.0%2,341,99531.9 min13.9%
Florida average9,9228.6%N/A33.2 min23.8%

St. Lucie County ranked within Florida

St. Lucie County sits in the top quarter of the Florida field on highway truck volume, at #11 of 60.

St. Lucie 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. Lucie CountyFlorida rank
Traffic volume (AADT)8,693#22 of 67
Highway vehicle-miles per day3,409,229#19 of 60
Truck share on highways18.8%#17 of 60
Highway trucks per day2,945#11 of 60
Average travel time32.8 min#40 of 67
Average driver income$77,199#27 of 67
Average driver age51.5 yrs#17 of 67

Busiest roads in St. Lucie County, Florida

The three busiest roads in St. Lucie County average 54,797 vehicles a day, 6.3 times the county average of 8,693 across all its monitored roads.

I 95 leads with 66,240 vehicles a day, 8,600 of them trucks (13.0%). Florida's Turnpike carries the most trucks, 10,810 a day (27.3% of its traffic), although it ranks #5 for all traffic.

Trips using Florida's Turnpike are long: a median of 73.2 minutes against 32.8 county-wide, the mark of a through route.

Trucks make up 27.3% of traffic on Florida's Turnpike, against 11.5% across all roads in the county.

Southwest Port Saint Lucie Boulevard is busy with cars rather than freight: only 3.8% of its traffic is trucks, against 11.5% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 95Motorway · 66,240vehicles8,600trucks · 13.0%
Road class
Motorway
Congestion ratio
41.5%
Median trip time
43.7 min
Drivers’ median age
51.5 yrs
Drivers’ average income
$83,235

Drivers on I 95 are on long journeys, a median 43.7 minutes against 32.8 county-wide: a through route more than a local street.

2Southeast Port Saint Lucie BoulevardPrimary road · 50,978vehicles1,938trucks · 3.8%
Road class
Primary road
Congestion ratio
53.1%
Median trip time
32.1 min
Drivers’ median age
51.5 yrs
Drivers’ average income
$80,559

Southeast Port Saint Lucie Boulevard is one of the more congested roads here: trips take 53% longer than at free-flow speed, against 22% county-wide.

3Southwest Port Saint Lucie BoulevardPrimary road · 47,174vehicles1,781trucks · 3.8%
Road class
Primary road
Congestion ratio
48.7%
Median trip time
31.2 min
Drivers’ median age
51.3 yrs
Drivers’ average income
$80,498

Delays build on Southwest Port Saint Lucie Boulevard: its congestion ratio of 49% over free-flow time is well above the county's 22%.

4Southwest Gatlin BoulevardPrimary road · 40,749vehicles1,393trucks · 3.4%
Road class
Primary road
Congestion ratio
42.4%
Median trip time
30.4 min
Drivers’ median age
51.4 yrs
Drivers’ average income
$82,963

On its busiest stretch, Southwest Gatlin Boulevard carries 4.7 times the county average; trucks are 3.4% of it, below the county-wide 11.5%.

5Florida's TurnpikeMotorway · 39,612vehicles10,810trucks · 27.3%
Road class
Motorway
Congestion ratio
42.9%
Median trip time
73.2 min
Drivers’ median age
48.2 yrs
Drivers’ average income
$94,242

Florida's Turnpike peaks at 39,612 vehicles a day, 4.6 times the county average; trucks are 27.3% of it, above the county-wide 11.5%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Florida's TurnpikeMotorway · #5 by traffic39,612vehicles10,810trucks · 27.3%
2I 95Motorway · #1 by traffic66,240vehicles8,600trucks · 13.0%
34th StreetPrimary road · 30,309vehicles3,014trucks · 9.9%
Road class
Primary road
Congestion ratio
44.9%
Median trip time
33.6 min
Drivers’ median age
53.1 yrs
Drivers’ average income
$63,520

4th Street carries 3.5 times the county average at its busiest, 3,014 of them trucks (9.9%, below the county-wide 11.5%).

4State Road A1APrimary road · 26,850vehicles2,519trucks · 9.4%
Road class
Primary road
Median trip time
33.4 min
Drivers’ median age
53.8 yrs
Drivers’ average income
$65,921

State Road A1A carries 3.1 times the county average on its busiest stretch, where the median trip lasts 33.4 minutes.

5Prima Vista BoulevardSecondary road · 31,138vehicles2,173trucks · 7.0%
Road class
Secondary road
Congestion ratio
41.7%
Median trip time
29.8 min
Drivers’ median age
51.5 yrs
Drivers’ average income
$76,849

At 3.6 times the county average, Prima Vista Boulevard draws drivers from neighborhoods averaging $76,849 in household income.

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. LucieDepartment 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. Lucie County

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

Need segment-level traffic data?

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