emergency vehicle traffic signal preemption system

Thread Starter


Joined Jun 28, 2007
i have designed a simple traffic signal system using gates. i am interested to allow an ambulance to cross the signal even it is red i-e in case if it faces the red signal it should convert it green and convert others into red. i have alredy made the logic for it but in case if two vehicles comes what should i do .; in case if i use priority encoder then what happen if a vehicles comes on low priority signal earlier and other vehicles comes later on high priority signal what would happens that vehicle will wait there . i want a constant non stop flow of emergency vehicles at traffic signals please reply at