Traffic congestion map
A traffic congestion map is a graphical,
realtimeor near-realtime representation of traffic flow for some particular area. This might be displayed on a web pagefor ease of access, to help commuters decide how to avoid congested areas. Frequently these show conditions on highways, but local streets can also be shown.
Data is typically collected via
loop sensors embedded in the roadways, then processed by computerat a central facility and distributed as a mapview to users.
Many websites or news channels show these maps, and sometimes they are displayed directly to motorists using electronic signs, such as those on the
2nd Ring Roadin Beijing.
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