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Sig alert, Sig-alert or Sigalert in California, as well as other parts of the United States, means an incident that significantly disrupts road traffic.The term was originally the name of a pioneering system of automated radio broadcasts regarding traffic conditions, introduced in the 1950s and named after its inventor, Loyd Sigmon.
At the Concord Rotary, a major traffic choke point, Route 2 becomes a four-lane surface road and intersects with Route 2A and the eastern terminus of Route 119 (which is concurrent with Route 2A). After the rotary, the road passes by the State Police (who have an emergency-only traffic light) and over the Assabet River. Route 2A formerly broke ...
Boston remains one of the most congested metropolitan areas in the US. The complex and still-changing road network, with many one-way streets and time-based traffic restrictions, has led many Boston travelers to consider an up-to-date GPS navigation map system a necessity.
This is a list of roundabouts in the state of Massachusetts in the United States.Intersections that are called traffic circles or roundabouts in the rest of the US are referred to as "rotaries" in Massachusetts, as well as other parts of New England including parts of Connecticut, [1] New Hampshire, [2] Maine [3] Rhode Island, & Vermont.
A traffic camera is a video camera which observes vehicular traffic on a road. Typically, traffic cameras are put along major roads such as highways, freeways, expressways and arterial roads, and are connected by optical fibers buried alongside or under the road, with electricity provided either by mains power in urban areas, by solar panels or other alternative power sources which provide ...
A traffic congestion map is a graphical, realtime or near-realtime representation of traffic flow for some particular area. [1] Data is typically collected via anonymous GPS datapoints and loop sensors embedded in the roadways, then processed by computer at a central facility and distributed as a map view to users.
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Interstate 495 (I-495) is an auxiliary route of I-95 in the US state of Massachusetts, maintained by the Massachusetts Department of Transportation (MassDOT). Spanning 121.56 miles (195.63 km), it is the second-longest auxiliary route in the Interstate Highway System, being roughly 11 miles (18 km) shorter than I-476 in Pennsylvania.