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Traffic heat map of Harrison County, Mississippi: 717 miles of roads shaded from blue (light) to red (heavy traffic), busiest on US 49 and I 10

Harrison County, Mississippi Traffic Counts

Traffic analytics for Harrison County, Mississippi, calculated from real-world mobile and sensor networks on 12,591 road segments (717 road miles, about 300 ft each). It has the busiest roads of any county in Mississippi, averaging 13,207 vehicles a day. 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 Harrison County, Mississippi

Traffic

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

vehicles per day13,207
Trucks

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

7.5%
Average travel time

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

31.5 min
Congestion ratio

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

31.6%
Drivers’ average age

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

46.1 yrs
Drivers’ average income

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

$68,584

The average monitored road in Harrison County, Mississippi carries 13,207 vehicles per day. Across its 717 miles of monitored roads, that adds up to 9,299,337 vehicle-miles traveled per day (≈3.4 billion per year). Trucks are a smaller part of the mix than across Mississippi: 7.5% against 11.1%.

The busiest roads of any county in Mississippi

Harrison's average daily traffic volume is 148% higher than the state average - 13,207 vehicles per day against 5,319 - suggesting more traffic load per road - heavy exposure for roadside retail, and tight road space for deliveries. Across the whole network, that travel is about 9.4% of Mississippi's statewide total. Harrison stands out as having the highest traffic volume in Mississippi - 13,207 vehicles per day.

Journey times here (31.5 minutes on average) closely track the state level. 52% of counties in Mississippi have a longer average travel time than Harrison's 31.5 minutes.

Congestion runs 108% higher than the state level, at a ratio of 31.6%, which means more pronounced congestion - expect markedly slower peak-hour deliveries and unreliable arrival times.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Harrison County, Mississippi

Trafficvehicles per day26,143
Trucks11.6%
Average travel time35.5 min
Congestion ratio49.3%
Drivers’ average age46.6 yrs
Drivers’ average income$70,334

Highways carry a significant share of travel in Harrison County, Mississippi: 39% of all vehicle-miles. The average highway carries 26,143 vehicles per day, 109% more than the average non-highway road in the same area, which carries 12,527 vehicles per day.

Highways make up 20% of the monitored road miles (141 miles, 629 segments), so they carry more than their share: 3,655,476 vehicle-miles traveled per day (≈1.3 billion per year).

By highway travel volume, that ranks Harrison in the top 3 counties in Mississippi.

More highway trucks than 95% of counties in Mississippi

Highway truck concentration here runs 27% lower than the state average, at 11.6%. Trucks are a small share of a very large highway flow, so Harrison still moves heavy freight volumes alongside its passenger traffic.

90% of counties in Mississippi see a higher highway truck share than Harrison's 11.6%. By raw truck volume, Harrison carries more highway trucks than 95% of counties in Mississippi.

non-highway traffic icon

Non-highway Traffic in Harrison County, Mississippi

Trafficvehicles per day12,527
Trucks4.8%
Average travel time31.3 min
Congestion ratio30.6%
Drivers’ average age46.0 yrs
Drivers’ average income$67,636

A little more than half of the driving in Harrison County, Mississippi happens on local roads: 61% of all vehicle-miles. On the average non-highway road, that comes to 12,527 vehicles per day.

Local roads make up 80% of the monitored road miles (576 miles in 11,962 segments) but carry less than their share of travel: 5,643,861 vehicle-miles traveled per day (≈2.1 billion per year). Trucks make up 4.8% of non-highway traffic, about 1 in 21 vehicles.

Local congestion 104% above the Mississippi average

Compared to highways, non-highway routes see 58% fewer trucks by share.

Non-highway congestion (30.6%) runs 104% higher than the state average, pointing to slower local traffic flow.

Harrison's average driver income is higher than 88% of counties in Mississippi. 53% of counties in Mississippi have an older driver population than Harrison.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and a long afternoon plateau from 3:00 PM to 7:00 PM, with volumes reaching approximately 65% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 12% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
May–July is the high season, with volumes +6% versus the annual average.
Lowest month:
January is the quietest month, with volumes -9% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Harrison County, Mississippi, the peak hour concentrates about 7% of the day's traffic, and there is a noticeable seasonal swing of +6% in high season.

Harrison County vs. Mississippi Traffic Comparison

Of the four measures, average daily traffic per road differs most: Harrison County runs 148% above the Mississippi average. Its truck share, by contrast, is 32% below.

MetricHarrison CountyMississippi averageDifference
Traffic13,2075,319+148.3%
Truck % (Total Traffic)7.5%11.1%-32.5%
Truck % (Highway)11.6%15.9%-27.1%
Avg. Travel Time31.5 min30.7 min+2.6%

How Harrison County compares

Harrison County is more congested than any nearby county

Set against the average of the 4 areas nearest to it, Harrison County carries 117.8% more traffic on a typical road and is 81.6% more congested; it has the busiest roads of the five. It is where traffic concentrates in this corner of the map - the local bottleneck, with more vehicles per road AND less room to absorb them.

Harrison County and the 4 nearest county-level areas by centroid distance, with the Mississippi average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Harrison County13,2077.5%9,299,33731.5 min31.6%
Stone County, Mississippi3,0209.4%639,46731.8 min10.1%
Hancock County, Mississippi5,83510.9%2,876,84732.2 min16.4%
Jackson County, Mississippi10,0509.5%7,456,96828.5 min22.1%
Pearl River County, Mississippi5,35110.8%2,116,63328.1 min20.9%
Mississippi average5,31911.1%N/A30.7 min15.2%

Harrison County ranked within Mississippi

No other county-level area in Mississippi records a higher average daily traffic volume than Harrison County.

Harrison County ranked among 82 county-level areas in Mississippi (1 = highest); measures without data in every county rank a smaller field, down to 78.
MeasureHarrison CountyMississippi rank
Traffic volume (AADT)13,207#1 of 82
Highway vehicle-miles per day3,655,476#2 of 78
Truck share on highways11.6%#70 of 78
Highway trucks per day3,030#5 of 78
Average travel time31.5 min#43 of 82
Average driver income$68,584#11 of 82
Average driver age46.1 yrs#44 of 82

The two ends of this table sit far apart: #1 of 82 on average daily traffic volume, against #70 of 78 on truck share on highways.

Busiest roads in Harrison County, Mississippi

Traffic concentrates on a few corridors: the three busiest roads average 80,570 vehicles a day, against 13,207 on the average road in Harrison County.

US 49 is the busiest road, at 92,032 vehicles a day, 4,902 of them trucks (5.3%). I 10 carries the most trucks, 10,757 a day (13.4% of its traffic), although it ranks #2 for all traffic.

Freight stands out on I 10: trucks are 13.4% of the traffic there, against 7.5% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1US 49Primary road · 92,032vehicles4,902trucks · 5.3%
Road class
Primary road
Congestion ratio
68.5%
Median trip time
33.8 min
Drivers’ median age
46.5 yrs
Drivers’ average income
$59,220

US 49 carries 7.0 times the county average at its busiest, 4,902 of them trucks (5.3%, below the county-wide 7.5%).

2I 10Motorway · 80,342vehicles10,757trucks · 13.4%
Road class
Motorway
Congestion ratio
67.0%
Median trip time
38.6 min
Drivers’ median age
47.2 yrs
Drivers’ average income
$69,699

I 10 carries 6.1 times the county average on its busiest stretch, where the median trip lasts 38.6 minutes.

3Lorraine RoadPrimary road · 69,338vehicles5,668trucks · 8.2%
Road class
Primary road
Congestion ratio
105.3%
Median trip time
31.8 min
Drivers’ median age
46.1 yrs
Drivers’ average income
$68,720

Delays build on Lorraine Road: its congestion ratio of 105% over free-flow time is well above the county's 32%.

4Beach BoulevardPrimary road · 60,458vehicles3,292trucks · 5.4%
Road class
Primary road
Congestion ratio
76.3%
Median trip time
29.6 min
Drivers’ median age
45.7 yrs
Drivers’ average income
$64,503

The busiest stretch of Beach Boulevard carries 4.6 times the county average; trucks are 5.4% of it, below the county-wide 7.5%.

5Cowan RoadPrimary road · 60,410vehicles2,662trucks · 4.4%
Road class
Primary road
Congestion ratio
100.7%
Median trip time
30.5 min
Drivers’ median age
46.0 yrs
Drivers’ average income
$69,857

Travel on Cowan Road's busiest stretch runs 101% over free-flow time, against 32% across the county, so expect slower peak hours.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 10Motorway · #2 by traffic80,342vehicles10,757trucks · 13.4%
2Lorraine RoadPrimary road · #3 by traffic69,338vehicles5,668trucks · 8.2%
3US 49Primary road · #1 by traffic92,032vehicles4,902trucks · 5.3%
4I 110Motorway · 49,240vehicles3,850trucks · 7.8%
Road class
Motorway
Congestion ratio
66.6%
Median trip time
26.4 min
Drivers’ median age
45.6 yrs
Drivers’ average income
$67,060

On its busiest stretch, I 110 carries 3.7 times the county average; trucks are 7.8% of it, in line with the county-wide 7.5%.

5Beach BoulevardPrimary road · #4 by traffic60,458vehicles3,292trucks · 5.4%
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

HarrisonDepartment 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 Harrison County

The same traffic breakdown for the areas closest to Harrison County, Mississippi.

Need segment-level traffic data?

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