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Virtual racer
 · TiruchirappalliIndia
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Sensors:
induction loops are the primary - most reliable method: the coils (usually just several loops of wire) embedded in the road; fed given frequency from a generator, in presence of metal the frequency of the LC circuit changes and the sensor circuitry detects the change of frequency, producing a presence signal. In some cases these may fail to detect bicycles, but they are by far most common as they aren’t affected by weather (or more precisely, the detection circuit tunes in to slow changes of frequency caused by weather) and are immune to accidental false positives. Note the loops can be localized (~2m size) or cover a lengthy part of a lane.
Radar :
we could use radar for detecting pedestrians .
We should try to use multiple sensors for accuracy.but keeping cost in mind we may need to fabricate our own

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Electrical and Electronics Engineering student (Project Leader)
 · New DelhiIndia
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+Bala Subramanian Ram these Induction loops could they sense metal across the road ? we have to bury these loops in ground or just hang them on poll ? Though we could Ultrasonic sensors and ir sensors for detecting motion .

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