This page delivers traffic analytics for Lewis and Clark County, Montana. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Lewis and Clark County, Montana among 466 road miles divided in 6,334 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 388 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
The average number of vehicles that travel each day over any road in the road network.
4,942
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
8.1%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
44.2 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
15.0%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
48.4 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$77,086
Our data indicates an estimated average traffic volume of 4,942 vehicles per day in Lewis and Clark County, Montana that results in 1,349,800 vehicle-miles traveled per day (≈493 million per year). The traffic stream is comprised of an average of 1 truck for every 12 vehicles. Typical time spent behind the wheel per trip is 44.2 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the Montana state averages: Lewis and Clark sees 18% higher average daily traffic volume than the state average (4,942 vehicles per day against 4,202), suggesting more demand on each road - a critical factor for logistics and site planning. Network-wide, Lewis and Clark accounts for about 4.7% of Montana's statewide total, at 1,349,800 vehicle-miles traveled per day (≈493 million per year). The average trip takes 44.2 minutes, 22% higher than the state level. Congestion runs 23% higher than the state level, at a ratio of 15.0% - more pronounced congestion - crucial for traffic control improvement and logistics planning. By volume, Lewis and Clark's 4,942 vehicles per day outpaces 93% of counties in Montana. On travel time, Lewis and Clark runs longer than 78% of counties in Montana.
Highway vs. Non-Highway Traffic Analysis
Highway Traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
6,715
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
10.5%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
34.6 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
15.7%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
48.8 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$79,272
A significant volume of traffic in Lewis and Clark County, Montana utilizes the highway network. The average highway carries 6,715 vehicles per day, 45% more than the average non-highway road in the same area, which carries 4,642 vehicles per day. That average covers 224 highway road miles divided in 914 segments (average segment length 1,294 ft), together carrying 713,052 vehicle-miles traveled per day (≈260 million per year). By highway travel volume, Lewis and Clark outranks 87% of counties in Montana. Trucks constitute 10.5% of highway traffic.
Analytical insight
Highway truck concentration here runs 30% lower than the state average, at 10.5% - positioning Lewis and Clark as a primarily local traffic hub. For logistics operators, this validates the importance of local access. Lewis and Clark's highway truck share (10.5%) is higher than 10% of counties in Montana. By raw truck volume, Lewis and Clark carries more highway trucks than 43% of counties in Montana.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
4,642
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
5.3%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
45.9 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
14.9%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
48.2 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$75,907
The non-highway road network in Lewis and Clark County, Montana supports a substantial volume of traffic. The average non-highway road carries 4,642 vehicles per day, 31% less than the average highway in the same area, which carries 6,715 vehicles per day. That average covers 242 non-highway road miles divided in 5,420 segments (average segment length 236 ft), together carrying 636,749 vehicle-miles traveled per day (≈232 million per year). Trucks constitute 5.3% of non-highway traffic.
Analytical insight
Non-highway roads carry a truck concentration that's 49% lower than the highway network. At 23% higher than the state level, the non-highway congestion ratio of 14.9% signals more friction on local roads. Lewis and Clark's overall average travel time exceeds 78% of counties in Montana. Trip origins here have higher average income than 91% of counties in Montana. 29% of counties in Montana have a younger driver population than Lewis and Clark.
Time-of-Day & Seasonal Patterns
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–12:00 PM and PM peak 3:00 PM–6:00 PM, with volumes reaching approximately 69% higher than the daily average.
Weekend traffic:
Weekend volumes run about 6% below weekday levels.
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +24% versus the annual average.
Lowest month:
January is the quietest month, with volumes -25% versus the annual average.
Analytical insight
In Lewis and Clark County, Montana, the peak hour concentrates about 7% of the day's traffic, and seasonal swing is pronounced at +24% in high season.
Traffic Flow Profile Comparison
Metric
Lewis and Clark
Montana
Average
Difference
Traffic
4,942
4,202
+17.6%
Truck % (Total Traffic)
8.1%
11.7%
-30.9%
Truck % (Highway)
10.5%
15.0%
-29.9%
Avg. Travel Time
44.2 min
36.2 min
+22.3%
Frequently Asked Questions
The average daily traffic volume is calculated at 4,942 vehicles per day, providing a baseline for daily operations and site assessment.
Trip origins in Lewis and Clark have higher average income than 91% of counties in Montana.
Weekday peaks occur between 7:00 AM and 12:00 PM in the morning and between 3:00 PM and 6:00 PM in the evening - about 69% above the daily average.
Traffic volumes are typically 24% higher during June–August. Volumes drop to their lowest levels in January, averaging 3,722 vehicles per day - a 25% decrease from the annual average.
Approximately 7% of highway traffic and 2% of non-highway traffic consists of vehicles whose trip originates outside Lewis and Clark County, Montana. This indicates that a portion of highway traffic is regional pass-through, while local roads are more representative of resident and commuter activity.
Drivers on Lewis and Clark roads have a median age of 48 years, and the median household income of the neighborhoods trips originate from averages $77,086 - useful context for retail siting and customer profiling.
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)
