This page delivers traffic analytics for Suffolk County, New York. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Suffolk County, New York among 2,453 road miles divided in 77,848 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 166 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.
9,234
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
6.0%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
31.3 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.
23.9%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
48.7 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$140,841
Our data indicates an estimated average traffic volume of 9,234 vehicles per day in Suffolk County, New York that results in 27,007,094 vehicle-miles traveled per day (≈9.9 billion per year). The traffic stream is comprised of an average of 1 truck for every 17 vehicles. Typical time spent behind the wheel per trip is 31.3 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the New York state averages: Suffolk sees 25% higher average daily traffic volume than the state average (9,234 vehicles per day against 7,377), suggesting more demand on each road - a critical factor for logistics and site planning. Across the whole network that adds up to 27,007,094 vehicle-miles traveled per day (≈9.9 billion per year), roughly 10% of New York's statewide total. Journey times run 10% lower than the state level, at 31.3 minutes on average. Congestion runs 16% higher than the state level, at a ratio of 23.9% - more pronounced congestion - crucial for traffic control improvement and logistics planning. By volume, Suffolk's 9,234 vehicles per day outpaces 87% of counties in New York. On travel time, Suffolk runs longer than 8% of counties in New York.
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.
20,974
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
7.5%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
34.4 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.
48.3%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
48.7 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$140,430
A significant volume of traffic in Suffolk County, New York utilizes the highway network. The average highway carries 20,974 vehicles per day, 150% more than the average non-highway road in the same area, which carries 8,382 vehicles per day. That average covers 563 highway road miles divided in 5,273 segments (average segment length 564 ft), together carrying 13,674,001 vehicle-miles traveled per day (≈5.0 billion per year). By highway travel volume, Suffolk ranks first in New York. Trucks constitute 7.5% of highway traffic.
Analytical insight
Highway truck concentration here runs 27% lower than the state average, at 7.5% - positioning Suffolk as a primarily local traffic hub. For logistics operators, this validates the importance of local access. 7% of counties in New York see a lower highway truck share than Suffolk's 7.5%. 62% of counties in New York see fewer highway trucks per day than Suffolk's roughly 1,573.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
8,382
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
4.5%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
31.1 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.
22.2%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
48.7 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$141,227
The non-highway road network in Suffolk County, New York supports a substantial volume of traffic. The average non-highway road carries 8,382 vehicles per day, 60% less than the average highway in the same area, which carries 20,974 vehicles per day. That average covers 1,889 non-highway road miles divided in 72,575 segments (average segment length 137 ft), together carrying 13,333,093 vehicle-miles traveled per day (≈4.9 billion per year). Trucks constitute 4.5% of non-highway traffic.
Analytical insight
Compared to highways, non-highway routes see 39% fewer trucks by share. The non-highway congestion ratio of 22.2% is 14% higher than the state level, suggesting slower local mobility than the state average. Overall, average travel time here is longer than 8% of counties in New York. 97% of counties in New York see lower average driver income among trip origins than Suffolk. Suffolk's median driver age is higher than 39% of counties in New York.
Time-of-Day & Seasonal Patterns
Peak Traffic Windows
Weekday peaks:
AM peak 10:00 AM–12:00 PM and PM peak 12:00 PM–7:00 PM, with volumes reaching approximately 66% higher than the daily average.
Weekend traffic:
Weekend volumes run about 9% below weekday levels.
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +16% versus the annual average.
Lowest month:
January is the quietest month, with volumes -16% versus the annual average.
Analytical insight
In Suffolk County, New York, the peak hour concentrates about 7% of the day's traffic, and seasonal swing is pronounced at +16% in high season.
Traffic Flow Profile Comparison
Metric
Suffolk
New York
Average
Difference
Traffic
9,234
7,377
+25.2%
Truck % (Total Traffic)
6.0%
8.0%
-24.1%
Truck % (Highway)
7.5%
10.3%
-27.1%
Avg. Travel Time
31.3 min
34.7 min
-9.8%
Frequently Asked Questions
The average daily traffic volume is calculated at 9,234 vehicles per day, providing a baseline for daily operations and site assessment.
Trip origins in Suffolk have higher average income than 97% of counties in New York.
Drivers on Suffolk roads have a median age of 49 years, and the median household income of the neighborhoods trips originate from averages $140,841 - useful context for retail siting and customer profiling.
Traffic volumes are typically 16% higher during June–August. Volumes drop to their lowest levels in January, averaging 7,746 vehicles per day - a 16% decrease from the annual average.
The average travel time for drivers is 31.3 minutes, offering a standard metric for commute and delivery route planning.
Trucks account for approximately 6.0% of the total traffic mix across all road types, with a significantly higher concentration of 7.5% on highways.
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)
