There's a long-running construction zone near my house where the road narrows to a single lane (it's a two-way street). At first they had flaggers at both ends

There's a long-running construction zone near my house where the road narrows to a single lane (it's a two-way street). At first they had flaggers at both ends controlling traffic, but at some point they rolled in some portable traffic light thingies that have cameras on them and do appear to work this way. I am a little suspicous of it though since the other day I noticed the light turn green for me while the last oncoming car was still clearing the street.