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Can I use the images from this site on my web page?
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The Images on this web site are copyrighted by the City of Los Angeles,
Department of Transportation. Please read our Terms of Use for additional details.
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What is ATSAC?
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ATSAC is the acronym for "Automated Traffic Surveillance and
Control". The ATSAC system is the City's computerized traffic management
system which optimizes traffic signal synchronization along streets in
each ATSAC area.
Click here for more details.
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Why are there no data in some areas?
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Real time traffic data is only
available at signalized intersections managed by the ATSAC system. As of
July 2000, ATSAC has been implemented at 57 percent of the City's 4,285
signalized intersections. ATSAC will be implemented at the remaining 43
percent of the City's signalized intersections as funding becomes
available.
Other areas are outside the jurisdictional boundaries of the City of Los Angeles and other agencies
are responsible to provide information in those areas.
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What does the color mean?
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The colors are used to indicate the average speed that traffic moved along a given length of roadway. These average speeds may vary slightly along the length of the street.
Green indicates traffic is traveling an average speed of greater than 20 miles per hour.
Yellow indicates traffic is traveling an average speed between 10 to 20 miles per hour.
Red indicates traffic may experience some delays with average speeds below 10 miles per hour.
Gray (blank) indicates that real time traffic data is currently unavailable on this link.
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How often is the traffic information updated?
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The traffic data is regenerated every
4-8 mintues. The date and time of the data is shown on the bottom of each
map.
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Where can I get freeway status information?
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Freeway speed status can be viewed by clicking on the
"Freeway Information" link on the upper
left. Freeway construction and lane
closure information in the Los Angeles area is available
here from
Caltrans.
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Where can I get transit and bus information?
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Also located in the
upper left portion of the web page is the icon for the
Regional Transit Systems. This will take you to the Metropolitian Transportation Agency's web site where there are a wealth of information on mass transit options in the Los Angeles county region, including both buses and rail systems. For transit options from City of Los Angeles, such as DASH, Communter Express, and City Ride, click on the "
LADOT Transit" link and it will take you to the LADOT's transit information page.
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Why isn't <name of street> shown in the close up map?
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Only streets where traffic data are currently available within the City of Los Angeles are represented on this map. Local residential streets typically have lower traffic volumes and are normally not monitored by the ATSAC system.
Areas covered by ATSAC is continually expanding. As the area expands, data from these new locations will be made
available on this website.
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Where can I send comments about this site?
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Comments and suggestions can be sent via an online
form. Click here for comments.
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