Programming

Hello,

I need to implement a semaphore in linux c with the following conditions:

1. When there is no pedestrian crossing the street cars can move freely,but if there are any
pedestrians crossing the street, the cars have to wait for pedestrians to pass there.

2. Pedestrians have to wait any car that happens to cross the street, but there are other
pedestrians crossing the street may pass through it simultaneously with other pedestrians.

I think I need two lights synchronized:

1. For pedestrians with a button
2. For Cars

But do not do that by pressing send a signal and an ALARM skip 60 seconds at traffic lights
the cars.

Does anyone can help or give me some pointers on how to do it?

regards

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