
Total Traffic Volume & Performance in Middlesex County, Massachusetts
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day9,540 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 6.7% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 33.4 min |
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Congestion ratio The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 27.2% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 45.7 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $136,201 |
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The average monitored road in Middlesex County, Massachusetts carries 9,540 vehicles per day. Across its 2,380 miles of monitored roads, that adds up to 31,388,712 vehicle-miles traveled per day (≈11.5 billion per year). Trucks are 6.7% of traffic, close to the 6.9% across Massachusetts.
Busier roads than 85% of counties in Massachusetts
Middlesex sees 17% higher average daily traffic volume than the state average (9,540 vehicles per day against 8,166), suggesting more demand on each road - a critical factor for logistics and site planning. Network-wide, Middlesex accounts for about 23% of Massachusetts's statewide total of vehicle-miles. Middlesex carries more traffic than 85% of counties in Massachusetts.
At 33.4 minutes, the average travel time matches the state level closely. On travel time, Middlesex runs shorter than 62% of counties in Massachusetts.
The congestion ratio of 27.2% runs slightly higher than the state level (13% higher) - crucial for traffic control improvement and logistics planning.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Middlesex County, Massachusetts
| Traffic | vehicles per day33,780 |
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| Trucks | 7.8% |
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| Average travel time | 40.5 min |
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| Congestion ratio | 63.1% |
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| Drivers’ average age | 46.1 yrs |
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| Drivers’ average income | $136,915 |
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Highways carry about half of all travel in Middlesex County, Massachusetts, 52% of vehicle-miles. The average highway carries 33,780 vehicles per day, 287% more than the average non-highway road in the same area, which carries 8,738 vehicles per day.
Yet highways are only 16% of the road network, 374 miles in 2,893 segments, so each mile of them is 3.3 times as busy as the average road mile.
By highway travel volume, Middlesex ranks first in Massachusetts.
More highway trucks than 91% of counties in Massachusetts
Highway truck concentration here runs 8% lower than the state average, at 7.8%. The highway traffic mix is typical for Massachusetts: neither freight- nor commuter-dominated.
By truck concentration, highways here outrank 55% of counties in Massachusetts. 91% of counties in Massachusetts see fewer highway trucks per day than Middlesex's roughly 2,621.

Non-highway Traffic in Middlesex County, Massachusetts
| Traffic | vehicles per day8,738 |
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| Trucks | 5.5% |
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| Average travel time | 33.2 min |
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| Congestion ratio | 26.0% |
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| Drivers’ average age | 45.2 yrs |
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| Drivers’ average income | $135,803 |
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Local roads carry about half of all travel in Middlesex County, Massachusetts, 48% of vehicle-miles. On the average non-highway road, that comes to 8,738 vehicles per day.
Spread over 2,007 miles and 87,478 segments, 84% of the road network, local roads carry a lighter load per mile: 15,117,964 vehicle-miles traveled per day (≈5.5 billion per year). Trucks make up 5.5% of non-highway traffic, about 1 in 18 vehicles.
Drivers from higher-income areas than 85% of counties in Massachusetts
The concentration of trucks on non-highway roads is 29% lower than on highways.
Non-highway congestion (26.0%) runs slightly higher than the state level (13% higher).
Trip origins here have higher average income than 85% of counties in Massachusetts. 85% of counties in Massachusetts have an older driver population than Middlesex.