Interactive Map: New Jersey’s Fastest Roads

Drivers in the center of the state have the heaviest lead feet, NJ speed-monitoring data shows

The percent of drivers exceeding the speed limit (or 55 mph in some locations) in 2011. Click on a point to see more speed data for a location.

Source: NJ Department of Transportation

The state Department of Transportation’s database of almost 70 sites that measured traffic counts and driver speeds last year show the two stretches of road with the highest median speeds — 72 miles per hour — were along Route 95 in Ewing and Route 195 in Upper Freehold, where the limit is 65.

New Jersey drivers’ reputation for speeding is confirmed by the data. The typical driver on only 14 of 69 roadways monitored — about 20 percent — was traveling at or below the posted speed limit. That occurred on county, state or, U.S. highways only; the median speed on all of the interstates measured exceeded the limit.

At five sites throughout the state, the median speed exceeded the limit by 10 miles per hour or more. The greatest difference was along Route 18 in Piscataway, where the speed limit is 45 but the median speed was 59 miles per hour.

There were three locations where virtually everyone ignored the speed limit. On Route 55 in Deptford, Route 202 in West Amwell, and I-80 express lanes in South Hackensack, more than 90 percent of drivers cruised along at 65 on Route 55 and 55 on the other two roadways.

The percent of drivers exceeding the speed limit in 2011 was lower than a year earlier in a majority of those locations for which data for both years was available. It declined at 31 locations and rose at 18 others. Using the median speed as a measurement, however, drivers at about half the monitoring locations moved faster in 2011 than in 2010, while at the other locations, the median speed declined from 2010 to 2011.

The DOT monitors traffic counts at thousands of sites across the state as required by the Federal Highway Administration. Additionally, the department measures travel speeds continuously at weigh-in-motion sites along county, state, and federal roads and interstates. These systems measure the speed at which each vehicle travels over a detection zone. The information is recorded and analyzed. Data for 2011 was available for 69 of 80 sites, with some under construction. The DOT’s information does not include toll roads.

Speed is measured at sites both heavily traveled and relatively quiet, ranging from an average daily traffic volume of 2,864 cars along Route 173 in Greenwich, Warren County, to 81,764 — almost one vehicle per second all day — along I-80 in Denville.