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Traffic heat map of Arapahoe County, Colorado: 1,070 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Valley Highway and I 225

Arapahoe County, Colorado Traffic Counts

Traffic analytics for Arapahoe County, Colorado, calculated from real-world mobile and sensor networks on 26,994 road segments (1,070 road miles, about 209 ft each). It ranks among the top 3 counties in Colorado for average daily traffic. 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 Arapahoe County, Colorado

Traffic

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

vehicles per day8,742
Trucks

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

6.7%
Average travel time

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

32.7 min
Congestion ratio

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

16.2%
Drivers’ average age

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

43.0 yrs
Drivers’ average income

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

$123,297

A typical monitored road in Arapahoe County, Colorado sees 8,742 vehicles per day, while its 1,070 miles of monitored roads together handle 10,827,702 vehicle-miles traveled per day (≈4.0 billion per year). About 1 in 15 vehicles is a truck, fewer than the 1 in 12 across Colorado.

Busier roads than 97% of counties in Colorado

At 8,742 vehicles per day, the average monitored road in Arapahoe carries 29% more traffic than the state average of 6,752, suggesting more demand on each road - a busier backdrop for retail sites, at the cost of slower access. In total volume terms, its road network carries about 8.5% of Colorado's statewide total of vehicle-miles. Arapahoe carries more traffic than 97% of counties in Colorado.

At 32.7 minutes, the average travel time matches the state level closely. Its average travel time of 32.7 minutes is shorter than 62% of counties in Colorado.

Congestion here (16.2%) closely tracks the state level.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Arapahoe County, Colorado

Trafficvehicles per day29,281
Trucks9.9%
Average travel time36.0 min
Congestion ratio39.2%
Drivers’ average age42.9 yrs
Drivers’ average income$120,710

A significant share of driving in Arapahoe County, Colorado, 41% of vehicle-miles, happens on highways. The average highway carries 29,281 vehicles per day, 271% more than the average non-highway road in the same area, which carries 7,887 vehicles per day.

Highways make up 16% of the monitored road miles (172 miles, 1,078 segments), so they carry more than their share: 4,407,475 vehicle-miles traveled per day (≈1.6 billion per year).

That is more highway travel volume than 89% of counties in Colorado.

More highway trucks than 94% of counties in Colorado

At 9.9%, highway truck share is 12% lower than the state average. The highway traffic mix is typical for Colorado: neither freight- nor commuter-dominated.

Arapahoe's highway truck share (9.9%) is lower than 64% of counties in Colorado. By raw truck volume, Arapahoe carries more highway trucks than 94% of counties in Colorado.

non-highway traffic icon

Non-highway Traffic in Arapahoe County, Colorado

Trafficvehicles per day7,887
Trucks4.4%
Average travel time32.5 min
Congestion ratio15.3%
Drivers’ average age43.0 yrs
Drivers’ average income$124,522

Local roads carry more than half of all travel in Arapahoe County, Colorado (59% of vehicle-miles). The average non-highway road carries 7,887 vehicles per day.

Local roads make up 84% of the monitored road miles (897 miles in 25,916 segments) but carry less than their share of travel: 6,420,226 vehicle-miles traveled per day (≈2.3 billion per year). About 1 in 23 vehicles on non-highway roads is a truck (4.4%).

Drivers from higher-income areas than 95% of counties in Colorado

The concentration of trucks on non-highway roads is 55% lower than on highways.

Non-highway congestion here (15.3%) closely tracks the state average.

Arapahoe's average driver income is higher than 95% of counties in Colorado. Arapahoe's median driver age is lower than 87% of counties in Colorado.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–10:00 AM and PM peak 3:00 PM–6:00 PM, with volumes reaching approximately 89% 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:
August–October is the high season, with volumes +12% versus the annual average.
Lowest month:
January is the quietest month, with volumes -21% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Arapahoe County, Colorado, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +12% in high season.

Arapahoe County vs. Colorado Traffic Comparison

Arapahoe County's biggest difference from the Colorado average is its average daily traffic per road, 29% above it. Its truck share, by contrast, is 20% below.

MetricArapahoe CountyColorado averageDifference
Traffic8,7426,752+29.5%
Truck % (Total Traffic)6.7%8.4%-20.5%
Truck % (Highway)9.9%11.2%-11.6%
Avg. Travel Time32.7 min33.2 min-1.5%

How Arapahoe County compares

Arapahoe County against nearby counties

Arapahoe County tracks the 4 areas around it closely - no measure in this table sets it far apart from the areas immediately next to it, though it has the third busiest roads of the five.

Arapahoe County and the 4 nearest county-level areas by centroid distance, with the Colorado average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Arapahoe County8,7426.7%10,827,70232.7 min16.2%
Adams County, Colorado9,1658.0%10,849,63632.3 min18.5%
Elbert County, Colorado2,96418.1%805,94229.2 min9.9%
Denver County, Colorado9,5126.3%13,746,46834.5 min19.7%
Douglas County, Colorado6,6146.9%8,581,07030.9 min16.0%
Colorado average6,7528.4%N/A33.2 min15.7%

Arapahoe County ranked within Colorado

On average daily traffic volume, Arapahoe County is among the three highest county-level areas in Colorado.

Arapahoe County ranked among 64 county-level areas in Colorado (1 = highest); measures without data in every county rank a smaller field, down to 54.
MeasureArapahoe CountyColorado rank
Traffic volume (AADT)8,742#3 of 64
Highway vehicle-miles per day4,407,475#7 of 54
Truck share on highways9.9%#35 of 54
Highway trucks per day2,911#4 of 54
Average travel time32.7 min#40 of 64
Average driver income$123,297#4 of 64
Average driver age43.0 yrs#55 of 64

Arapahoe County ranks #3 of 64 on average daily traffic volume but #55 of 64 on average driver age - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Arapahoe County, Colorado

Traffic concentrates on a few corridors: the three busiest roads average 136,846 vehicles a day, against 8,742 on the average road in Arapahoe County.

Valley Highway leads with 217,106 vehicles a day, 12,520 of them trucks (5.8%). No other road comes close: I 225, in second place, carries 125,925. It also carries the most trucks.

Freight stands out on Dwight D. Eisenhower Highway and I 70: trucks are 24.6% and 20.3% of the traffic there, against 6.7% county-wide.

I 70 carries longer journeys than most roads here, with a median trip of 42.6 minutes against 32.7 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Valley HighwayMotorway · 217,106vehicles12,520trucks · 5.8%
Road class
Motorway
Congestion ratio
96.6%
Median trip time
37.8 min
Drivers’ median age
43.2 yrs
Drivers’ average income
$130,766

Delays build on Valley Highway: its congestion ratio of 97% over free-flow time is well above the county's 16%.

2I 225Motorway · 125,925vehicles8,873trucks · 7.0%
Road class
Motorway
Congestion ratio
85.2%
Median trip time
37.9 min
Drivers’ median age
41.5 yrs
Drivers’ average income
$104,369

Travel on I 225's busiest stretch runs 85% over free-flow time, against 16% across the county, so expect slower peak hours.

3Dave Sanders Memorial HighwayMotorway · 67,509vehicles4,647trucks · 6.9%
Road class
Motorway
Congestion ratio
44.4%
Median trip time
36.8 min
Drivers’ median age
46.2 yrs
Drivers’ average income
$141,332

Dave Sanders Memorial Highway carries 7.7 times the county average on its busiest stretch, where the median trip lasts 36.8 minutes.

4Jefferson AvenueTrunk road · 59,319vehicles2,769trucks · 4.7%
Road class
Trunk road
Congestion ratio
57.5%
Median trip time
32.9 min
Drivers’ median age
42.8 yrs
Drivers’ average income
$107,758

At 6.8 times the county average, Jefferson Avenue draws drivers from neighborhoods averaging $107,758 in household income.

5Parker RoadTrunk road · 55,791vehicles2,840trucks · 5.1%
Road class
Trunk road
Congestion ratio
38.8%
Median trip time
32.1 min
Drivers’ median age
42.9 yrs
Drivers’ average income
$126,009

A main artery: Parker Road's busiest stretch carries 6.4 times the county average; trucks are 5.1% of it, below the county-wide 6.7%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Valley HighwayMotorway · #1 by traffic217,106vehicles12,520trucks · 5.8%
2I 225Motorway · #2 by traffic125,925vehicles8,873trucks · 7.0%
3Dwight D. Eisenhower HighwayMotorway · 31,218vehicles7,679trucks · 24.6%
Road class
Motorway
Congestion ratio
30.8%
Median trip time
40.4 min
Drivers’ median age
42.2 yrs
Drivers’ average income
$109,078

Dwight D. Eisenhower Highway carries 3.6 times the county average on its busiest stretch, where the median trip lasts 40.4 minutes.

4I 70Motorway · 31,724vehicles6,429trucks · 20.3%
Road class
Motorway
Congestion ratio
35.6%
Median trip time
42.6 min
Drivers’ median age
42.4 yrs
Drivers’ average income
$106,275

At 3.6 times the county average, I 70 draws drivers from neighborhoods averaging $106,275 in household income.

5Dave Sanders Memorial HighwayMotorway · #3 by traffic67,509vehicles4,647trucks · 6.9%
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

ArapahoeDepartment 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 Arapahoe County

The same traffic breakdown for the areas closest to Arapahoe County, Colorado.

Need segment-level traffic data?

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