This page delivers traffic analytics for Suffolk County, Massachusetts. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Suffolk County, Massachusetts among 499 road miles divided in 18,973 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 139 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.
13,001
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
6.2%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
38.1 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.
36.7%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
39.2 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$114,148
Our data indicates an estimated average traffic volume of 13,001 vehicles per day in Suffolk County, Massachusetts that results in 8,032,977 vehicle-miles traveled per day (≈2.9 billion per year). The traffic stream is comprised of an average of 1 truck for every 16 vehicles. Typical time spent behind the wheel per trip is 38.1 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the Massachusetts state averages: Suffolk sees 59% higher average daily traffic volume than the state average (13,001 vehicles per day against 8,166), suggesting more demand on each road - a critical factor for logistics and site planning. In total volume terms, its road network carries 8,032,977 vehicle-miles traveled per day (≈2.9 billion per year), about 5.9% of Massachusetts's statewide total. The average trip takes 38.1 minutes, 11% higher than the state level. Congestion runs 53% higher than the state level, at a ratio of 36.7% - more pronounced congestion - crucial for traffic control improvement and logistics planning. At 13,001 vehicles per day, Suffolk posts the highest average traffic volume in Massachusetts. On travel time, Suffolk runs longer than 92% of counties in Massachusetts.
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.
31,272
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
6.4%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
39.5 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.
59.0%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
42.2 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$127,713
A significant volume of traffic in Suffolk County, Massachusetts utilizes the highway network. The average highway carries 31,272 vehicles per day, 155% more than the average non-highway road in the same area, which carries 12,283 vehicles per day. That average covers 79 highway road miles divided in 717 segments (average segment length 584 ft), together carrying 3,045,602 vehicle-miles traveled per day (≈1.1 billion per year). Trucks constitute 6.4% of highway traffic.
Analytical insight
The concentration of trucks on highways (6.4%) is 23% lower than the state average for similar road classifications. This indicates Suffolk serves as a primarily local traffic hub. For logistics operators, this validates the importance of local access. By truck concentration, highways here outrank 9% of counties in Massachusetts. By raw truck volume, Suffolk carries more highway trucks than 64% of counties in Massachusetts.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
12,283
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.
38.0 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.
35.8%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
37.6 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$109,225
The non-highway road network in Suffolk County, Massachusetts supports a substantial volume of traffic. The average non-highway road carries 12,283 vehicles per day, 61% less than the average highway in the same area, which carries 31,272 vehicles per day. That average covers 420 non-highway road miles divided in 18,256 segments (average segment length 121 ft), together carrying 4,987,375 vehicle-miles traveled per day (≈1.8 billion per year). Trucks constitute 6.0% of non-highway traffic.
Analytical insight
The concentration of trucks on non-highway roads is 6% lower than on highways. Non-highway congestion (35.8%) runs 55% higher than the state average, pointing to slower local traffic flow. Overall, average travel time here is longer than 92% of counties in Massachusetts. Trip origins here have higher average income than 54% of counties in Massachusetts. Drivers here also skew toward the lowest median age in Massachusetts, at 39 years.
Time-of-Day & Seasonal Patterns
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and PM peak 12:00 PM–8:00 PM, with volumes reaching approximately 45% higher than the daily average.
Weekend traffic:
Weekend volumes run about 6% below weekday levels.
Seasonal Fluctuation
Busy season:
April–June is the high season, with volumes +5% versus the annual average.
Lowest month:
January is the quietest month, with volumes -9% versus the annual average.
Analytical insight
In Suffolk County, Massachusetts, the peak hour concentrates about 6% of the day's traffic, and seasonal swing is mild at +5% in high season.
Traffic Flow Profile Comparison
Metric
Suffolk
Massachusetts
Average
Difference
Traffic
13,001
8,166
+59.2%
Truck % (Total Traffic)
6.2%
6.9%
-10.8%
Truck % (Highway)
6.4%
8.4%
-23.4%
Avg. Travel Time
38.1 min
34.4 min
+10.8%
Frequently Asked Questions
The average daily traffic volume is calculated at 13,001 vehicles per day, providing a baseline for daily operations and site assessment.
Yes - at a median of 39 years, Suffolk has the lowest driver age of any county in Massachusetts.
Approximately 50% of highway traffic and 9% of non-highway traffic consists of vehicles whose trip originates outside Suffolk County, Massachusetts. This indicates that a portion of highway traffic is regional pass-through, while local roads are more representative of resident and commuter activity.
Trucks account for approximately 6.2% of the total traffic mix across all road types, with a significantly higher concentration of 6.4% on highways.
The average travel time for drivers is 38.1 minutes, offering a standard metric for commute and delivery route planning.
Traffic volumes are typically 5% higher during April–June. Volumes drop to their lowest levels in January, averaging 11,801 vehicles per day - a 9% decrease from the annual average.
Drivers on Suffolk roads have a median age of 39 years, and the median household income of the neighborhoods trips originate from averages $114,148 - useful context for retail siting and customer profiling.
Weekday peaks occur between 7:00 AM and 9:00 AM in the morning and between 12:00 PM and 8:00 PM in the evening - about 45% above the daily 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)
