Traffic sensor advise

wal.ee

New Member
Hi, an electronics noob here once again to ask questions =P
Alright, I am making a smart traffic light controller and pretty much have it working. Now i need to add sensors to the microcontroller to act as counters of total number of cars standing at the red light. Which sensor should i use? I mean as in a laser sensor, infrared etc etc...
I have 2 circuits one uses the microprocessor 74LS145 and the other uses AT89C2051.
 
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