This page delivers traffic analytics for Grand Isle County, Vermont. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Grand Isle County, Vermont among 66 road miles divided in 922 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 376 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.
2,808
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.
36.5 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.
9.5%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
50.0 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$91,715
Our data indicates an estimated average traffic volume of 2,808 vehicles per day in Grand Isle County, Vermont that results in 187,320 vehicle-miles traveled per day (≈68.4 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 36.5 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the Vermont state averages: Grand Isle's average daily traffic volume is 30% lower than the state average - 2,808 vehicles per day against 4,027 - suggesting less traffic load per road, a critical factor for logistics and site planning. Across the whole network that adds up to 187,320 vehicle-miles traveled per day (≈68.4 million per year), roughly 1.2% of Vermont's statewide total. The average trip takes 36.5 minutes, 12% higher than the state level. At 28% lower than the state level, the 9.5% congestion ratio signals smoother traffic flow - crucial for traffic control improvement and logistics planning. By volume, Grand Isle's 2,808 vehicles per day outpaces 23% of counties in Vermont. Its average travel time of 36.5 minutes is longer than 92% of counties in Vermont.
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.
4,806
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
11.1%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
33.4 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.
12.9%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
51.2 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$68,954
A significant volume of traffic in Grand Isle County, Vermont utilizes the highway network. The average highway carries 4,806 vehicles per day, 97% more than the average non-highway road in the same area, which carries 2,445 vehicles per day. That average covers 10 highway road miles divided in 142 segments (average segment length 357 ft), together carrying 48,426 vehicle-miles traveled per day (≈17.7 million per year). Trucks constitute 11.1% of highway traffic.
Analytical insight
The concentration of trucks on highways (11.1%) is 4% higher than the state average for similar road classifications. This indicates Grand Isle serves as a significant freight corridor. For logistics operators, this validates the importance of highway access. Grand Isle's highway truck share (11.1%) is higher than 58% of counties in Vermont. By raw truck volume, Grand Isle carries more highway trucks than 33% of counties in Vermont.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
2,445
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
7.1%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
37.0 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.
8.9%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
49.8 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$97,797
The non-highway road network in Grand Isle County, Vermont supports a substantial volume of traffic. The average non-highway road carries 2,445 vehicles per day, 49% less than the average highway in the same area, which carries 4,806 vehicles per day. That average covers 56 non-highway road miles divided in 780 segments (average segment length 379 ft), together carrying 138,894 vehicle-miles traveled per day (≈50.7 million per year). Trucks constitute 7.1% of non-highway traffic.
Analytical insight
The concentration of trucks on non-highway roads is 36% lower than on highways. At 28% lower than the state level, the non-highway congestion ratio of 8.9% signals easier movement on local roads. Overall, average travel time here is longer than 92% of counties in Vermont. 92% of counties in Vermont see lower average driver income among trip origins than Grand Isle. Grand Isle's median driver age is higher than 23% of counties in Vermont.
Time-of-Day & Seasonal Patterns
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 90% higher than the daily average.
Weekend traffic:
Weekend volumes run about 0% above weekday levels.
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +33% versus the annual average.
Lowest month:
January is the quietest month, with volumes -38% versus the annual average.
Analytical insight
In Grand Isle County, Vermont, the peak hour concentrates about 8% of the day's traffic, and seasonal swing is pronounced at +33% in high season.
Traffic Flow Profile Comparison
Metric
Grand Isle
Vermont
Average
Difference
Traffic
2,808
4,027
-30.3%
Truck % (Total Traffic)
8.1%
8.5%
-4.1%
Truck % (Highway)
11.1%
10.7%
+3.7%
Avg. Travel Time
36.5 min
32.7 min
+11.7%
Frequently Asked Questions
The average daily traffic volume is calculated at 2,808 vehicles per day, providing a baseline for daily operations and site assessment.
Grand Isle carries more highway trucks by raw volume than 33% of counties in Vermont, at roughly 533 per day.
Approximately 25% of highway traffic and 13% of non-highway traffic consists of vehicles whose trip originates outside Grand Isle County, Vermont. This indicates that a portion of highway traffic is regional pass-through, while local roads are more representative of resident and commuter activity.
Weekday peaks occur between 7:00 AM and 8:00 AM in the morning and between 4:00 PM and 6:00 PM in the evening - about 90% above the daily average.
The average travel time for drivers is 36.5 minutes, offering a standard metric for commute and delivery route planning.
Trucks account for approximately 8.1% of the total traffic mix across all road types, with a significantly higher concentration of 11.1% on highways.
Traffic volumes are typically 33% higher during June–August. Volumes drop to their lowest levels in January, averaging 1,736 vehicles per day - a 38% decrease from the annual average.
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)
