Like how do they do the speed maps and stuff like that?
2006-12-27 18:59:56 · 4 answers · asked by justin3067 2 in Cars & Transportation ➔ Commuting
Some have sensors. But most are by cameras.
Go to this site. It's just a sample of how they do it.
http://www.gcmtravel.com/gcm/cameraReport.jsp?location=GATEWAY.IL.I-80
2006-12-27 19:02:13 · answer #1 · answered by Anonymous · 0⤊ 1⤋
Its actually cool and scary in a 1984 ORWELLIAN way really - here in seattle the DOT has cameras that see lots of plates at one spot and when one of the plates shows up at a different spot the software figures time to distance and adjusts posted estimated drive time on reader boards all over puget sound -it makes 100's of these calculations a minute - 1984 is only a few years away-lol
2006-12-28 03:13:30 · answer #2 · answered by badmts 4 · 1⤊ 0⤋
the freeway doesnt detect, the person or people montering the congestion detects and reports as needed. Not to mention the police and other motorists
2006-12-28 14:39:19 · answer #3 · answered by princess 2 · 0⤊ 0⤋
Many highways have sensors built into the roadway surface for exactly this purpose.
2006-12-28 03:02:54 · answer #4 · answered by Bostonian In MO 7 · 0⤊ 0⤋