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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.
On some modern units, traffic reports can also be recorded and stored within the unit, both while the unit is switched on, but also for a pre-set period after the unit is turned off. It may also have in-built timers to seek and record the same for two separate daily occasions, e.g., one setting for before the morning commute, and the second for ...
Traffic reporting is the near real-time distribution of information about road conditions such as traffic congestion, detours, and traffic collisions. The reports help drivers anticipate and avoid traffic problems. Traffic reports, especially in cities, may also report on major delays to mass transit that does not necessarily involve roads. In ...
Traffic congestion was of such great concern by the late 1930s in the Los Angeles metropolitan area that the influential Automobile Club of Southern California engineered an elaborate plan to create an elevated freeway-type "Motorway System," a key aspect of which was the dismantling of the streetcar lines, to be replaced with buses that could ...
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Phoenix auto traffic depends on both freeways and surface streets. Freeways fall under the auspices of the Arizona Department of Transportation (ADOT). Phoenix ranks first in the nation in the quality of its urban freeways, and the state as a whole ranks first in the nation in the quality of bridges. [1]
US 60 (Superstition Freeway) – Globe, Phoenix: Former SR 360; US 60 exit 179: 172.57: 277.72: Holmes Avenue: North end state maintenance: N/A: Broadway Road: Partial interchange; access via northbound exit ramp and connector road: Main Street (Historic US 80) Former US 60 / US 70 / US 80 / US 89; former SR 93 north: 176.74: 284.44: McKellips Road
During the "west valley gap" years, westbound I-10 traffic was routed off the Maricopa Freeway at 19th Avenue in Phoenix, and stayed on the access road as it curved past the Durango Curve. Los Angeles-bound traffic then turned left on Buckeye Road and followed the "TO 10" signs down Buckeye Road (first marked US 80 until 1977, then SR 85 ) for ...