Question

 How do traffic lights know there are cars waiting at an intersection?

Answer There are all sorts of technologies for detecting cars -- everything from lasers to rubber hoses filled with air.By far the most common technique is the inductive loop. An inductive loop is simply ... Read More »
http://answers.yahoo.com/question/index?qid=20090126091032AAHiPcE

Top Q&A For: How do traffic lights know there are cars waiti...

If they start selling flying cars, would we have to follow traffic lights rules in the air?

Yes. They are called the FARs (Federal Air Regulations). It'll also cut down on drunk flying. Ma Nature takes no prisoners, it is a pass fail test. I tried flying, once after a couple of drinks. Th... Read More »
http://answers.yahoo.com/question/index?qid=20071020205140AAT3ixU

Do temporary traffic lights hold the same importance as normal traffic lights?

All government and city posted traffic signs and signals are to be treated as outlined in your DMV manual. If you go again permanent as well as temporary signs and signals, you are breaking the la... Read More »
http://answers.yahoo.com/question/index?qid=20070209085006AAfLXBZ

Traffic Intersection Games?

Drivers' inability to control traffic flow undoubtedly causes frustration and impatience as they sit behind other vehicles at intersections, construction zones or accident sites. While drivers can'... Read More »
http://www.ehow.com/info_8507599_traffic-intersection-games.html

Texas Divided Highway Intersection Traffic Laws?

Because traffic laws vary from state to state, it is important to know each state's particular guidelines if you plan to drive there. If you are driving or planning to drive in the state of Texas, ... Read More »
http://www.ehow.com/list_6852523_texas-highway-intersection-traffic-laws.html


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