So just something that’s been on my mind. At my workplace there’s an automatic road barrier that lifts up and down when vehicles arrive. However, it’s not used for a carpark system when people wave their tickets or something. It just goes up and down when a vehicle shows up.
However, it sometimes goes up for when say a pushcart is being rolled over whereas it wouldn’t for a guy pushing a bin.
So tldr, how does an automatic road barrier decide that yes, a vehicle is coming, and therefore opens up?
This, it’s like a metal detector but, bigger. Temporary boom gates might use infrared motion sensors like automatic lights. edit: “lights” like the lights some people have on their porch.
It’s bigger in overall structure size, but isn’t really that big itself. It’s just a wire loop, they can be installed into existing roads with minimal effort - they just dig a narrow trench and then seal it up, it doesn’t require more tarmac.