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Traffic heat map of Larimer County, Colorado: 914 miles of roads shaded from blue (light) to red (heavy traffic), busiest on US 34 and Harmony Road

Larimer County, Colorado Traffic Counts

TrafficZoom tracks traffic on 914 road miles in Larimer County, Colorado, divided into 18,722 segments averaging 258 ft. Its busiest road, US 34, carries 44,010 vehicles a day, 5.9 times the average road. 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 Larimer County, Colorado

Traffic

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

vehicles per day7,445
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.

31.8 min
Congestion ratio

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

21.3%
Drivers’ average age

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

41.8 yrs
Drivers’ average income

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

$100,951

A typical monitored road in Larimer County, Colorado sees 7,445 vehicles per day, while its 914 miles of monitored roads together handle 6,932,012 vehicle-miles traveled per day (≈2.5 billion per year). About 1 in 13 vehicles is a truck, in line with Colorado (8.4%).

Busier roads than 90% of counties in Colorado

Larimer's average daily traffic volume is 10% higher than the state average - 7,445 vehicles per day against 6,752 - a critical factor for logistics and site planning. In total volume terms, its road network carries about 5.5% of Colorado's statewide total of vehicle-miles. Larimer carries more traffic than 90% of counties in Colorado.

The average trip takes 31.8 minutes, on par with the state level. 67% of counties in Colorado have a longer average travel time than Larimer's 31.8 minutes.

Congestion runs 35% higher than the state level, at a ratio of 21.3%, which means more pronounced congestion - expect slower peak-hour deliveries and less predictable arrival times.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Larimer County, Colorado

Trafficvehicles per day15,501
Trucks10.7%
Average travel time34.9 min
Congestion ratio29.3%
Drivers’ average age42.9 yrs
Drivers’ average income$99,609

Highways carry about half of all travel in Larimer County, Colorado, 49% of vehicle-miles. The average highway carries 15,501 vehicles per day, 158% more than the average non-highway road in the same area, which carries 6,008 vehicles per day.

With 25% of the road miles (227 miles in 2,834 segments), highways punch above their length, carrying 3,377,653 vehicle-miles traveled per day (≈1.2 billion per year).

That is more highway travel volume than 87% of counties in Colorado.

More highway trucks than 75% of counties in Colorado

The concentration of trucks on highways (10.7%) is 5% lower than the state average for similar road classifications. The highway traffic mix is typical for Colorado: neither freight- nor commuter-dominated.

By truck concentration, highways here trail 57% of counties in Colorado. Larimer's highway truck count is higher than 75% of counties in Colorado, at roughly 1,654 trucks per day.

non-highway traffic icon

Non-highway Traffic in Larimer County, Colorado

Trafficvehicles per day6,008
Trucks4.4%
Average travel time31.2 min
Congestion ratio19.9%
Drivers’ average age40.5 yrs
Drivers’ average income$101,871

Local roads carry about half of all travel in Larimer County, Colorado, 51% of vehicle-miles. A typical local road sees 6,008 vehicles per day.

Spread over 687 miles and 15,888 segments, 75% of the road network, local roads carry a lighter load per mile: 3,554,359 vehicle-miles traveled per day (≈1.3 billion per year). The truck share on non-highway roads is 4.4%.

Younger drivers than 94% of counties in Colorado

The concentration of trucks on non-highway roads is 59% lower than on highways.

Non-highway congestion (19.9%) runs 32% higher than the state average, pointing to slower local traffic flow.

79% of counties in Colorado see lower average driver income among trip origins than Larimer. The driver population here skews younger than 94% of counties in Colorado.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
A long morning plateau from 8:00 AM to 12:00 PM and PM peak 3:00 PM–6:00 PM, with volumes reaching approximately 88% higher than the daily average.
Weekend traffic:
Weekend traffic is about as busy as on weekdays (+1%): leisure and through trips largely replace the commute.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
July–September is the high season, with volumes +22% versus the annual average.
Lowest month:
January is the quietest month, with volumes -25% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Larimer County, Colorado, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +22% in high season.

Larimer County vs. Colorado Traffic Comparison

Larimer County stays close to the Colorado average; the largest gap is its truck share, 11% below.

MetricLarimer CountyColorado averageDifference
Traffic7,4456,752+10.3%
Truck % (Total Traffic)7.5%8.4%-11.3%
Truck % (Highway)10.7%11.2%-5.2%
Avg. Travel Time31.8 min33.2 min-4.2%

How Larimer County compares

Larimer County against nearby counties

Compared with its 4 closest neighbours, Larimer County is 63.4% more congested and carries 54.7% more traffic on a typical road; it has the second 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.

Larimer 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
Larimer County7,4457.5%6,932,01231.8 min21.3%
Boulder County, Colorado8,5545.1%5,372,03733.6 min19.7%
Jackson County, Colorado1,14710.9%86,89527.7 min5.5%
Weld County, Colorado5,26210.9%9,489,73133.5 min13.5%
Grand County, Colorado4,2847.7%728,10530.3 min13.5%
Colorado average6,7528.4%N/A33.2 min15.7%

Larimer County ranked within Colorado

Larimer County sits in the bottom quarter of the Colorado field on average driver age, at #60 of 64.

Larimer County ranked among 64 county-level areas in Colorado (1 = highest); measures without data in every county rank a smaller field, down to 54.
MeasureLarimer CountyColorado rank
Traffic volume (AADT)7,445#7 of 64
Highway vehicle-miles per day3,377,653#8 of 54
Truck share on highways10.7%#31 of 54
Highway trucks per day1,654#14 of 54
Average travel time31.8 min#43 of 64
Average driver income$100,951#14 of 64
Average driver age41.8 yrs#60 of 64

The two ends of this table sit far apart: #7 of 64 on average daily traffic volume, against #60 of 64 on average driver age.

Busiest roads in Larimer County, Colorado

Traffic concentrates on a few corridors: the three busiest roads average 43,229 vehicles a day, against 7,445 on the average road in Larimer County.

US 34 leads with 44,010 vehicles a day, 2,740 of them trucks (6.2%). Harmony Road is practically level with it at 43,861. Dwight D. Eisenhower Highway carries the most trucks, 6,036 a day (14.8% of its traffic), although it ranks #4 for all traffic.

Trucks make up 14.8% of traffic on Dwight D. Eisenhower Highway, against 7.5% across all roads in the county.

Dwight D. Eisenhower Highway carries longer journeys than most roads here, with a median trip of 44.2 minutes against 31.8 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1US 34Trunk road · 44,010vehicles2,740trucks · 6.2%
Road class
Trunk road
Congestion ratio
40.1%
Median trip time
31.2 min
Drivers’ median age
44.0 yrs
Drivers’ average income
$99,284

At 5.9 times the county average, US 34 draws drivers from neighborhoods averaging $99,284 in household income.

2Harmony RoadPrimary road · 43,861vehicles2,045trucks · 4.7%
Road class
Primary road
Congestion ratio
58.7%
Median trip time
31.6 min
Drivers’ median age
41.2 yrs
Drivers’ average income
$111,975

Delays build on Harmony Road: its congestion ratio of 59% over free-flow time is well above the county's 21%.

3Eisenhower BoulevardTrunk road · 41,815vehicles2,355trucks · 5.6%
Road class
Trunk road
Congestion ratio
37.8%
Median trip time
30.9 min
Drivers’ median age
45.4 yrs
Drivers’ average income
$95,842

A main artery: Eisenhower Boulevard's busiest stretch carries 5.6 times the county average; trucks are 5.6% of it, below the county-wide 7.5%.

4Dwight D. Eisenhower HighwayMotorway · 40,829vehicles6,036trucks · 14.8%
Road class
Motorway
Congestion ratio
53.7%
Median trip time
44.2 min
Drivers’ median age
42.3 yrs
Drivers’ average income
$108,755

Travel on Dwight D. Eisenhower Highway's busiest stretch runs 54% over free-flow time, against 21% across the county, so expect slower peak hours.

5Mulberry StreetTrunk road · 38,830vehicles2,319trucks · 6.0%
Road class
Trunk road
Congestion ratio
45.9%
Median trip time
32.4 min
Drivers’ median age
38.6 yrs
Drivers’ average income
$91,387

Mulberry Street is a trunk route for the county, carrying 5.2 times the county average on its busiest stretch; trucks are 6.0% of it, below the county-wide 7.5%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Dwight D. Eisenhower HighwayMotorway · #4 by traffic40,829vehicles6,036trucks · 14.8%
2US 34Trunk road · #1 by traffic44,010vehicles2,740trucks · 6.2%
3Eisenhower BoulevardTrunk road · #3 by traffic41,815vehicles2,355trucks · 5.6%
4Mulberry StreetTrunk road · #5 by traffic38,830vehicles2,319trucks · 6.0%
5Harmony RoadPrimary road · #2 by traffic43,861vehicles2,045trucks · 4.7%
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

LarimerDepartment 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 Larimer County

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

Need segment-level traffic data?

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