my interest is to build a traffic counter as a academic project . this traffic counters will be placed at each of the roads at the junction and these counters are connected to the central microcontroller and the central microcontroller will control the RED,GREEN values that has to be given to the appropriate signals.
I have seen many sites showing piezoelectric tubes, inductive loops and pressure hoses.
i also saw about the usage of ultrasonic and infrared sensors.
I am in a confusion what to choose and how to proceed . please explain.